<?xml version="1.0" encoding="us-ascii"?>
<!-- Prepared by Clarity FSR  v6.6.0.454 using Fujitsu Interstage XWand -->
<linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/instance http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <roleRef roleURI="http://www.comcast.com/role/StatementConsolidatedBalanceSheet" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#StatementConsolidatedBalanceSheet" />
  <roleRef roleURI="http://www.comcast.com/role/StatementConsolidatedStatementOfIncome" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#cmcsa_ELRID_ConsolidatedStatementOfIncome" />
  <roleRef roleURI="http://www.comcast.com/role/StatementConsolidatedStatementOfCashFlows" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#StatementConsolidatedStatementOfCashFlows" />
  <roleRef roleURI="http://www.comcast.com/role/ConsolidatedStatementOfComprehensiveIncome" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#cmcsa_ELRID_ConsolidatedStatementOfComprehensiveIncome" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureEarningsPerShareDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#DisclosureEarningsPerShareDetails" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureInvestmentsDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#cmcsa_ELRID_InvestmentsDetails" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureNoncontrollingInterestsDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#DisclosureNoncontrollingInterestsDetails" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfNetDeferredTaxLiabilityDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#DisclosureIncomeTaxesComponentsOfNetDeferredTaxLiabilityDetails" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureInvestmentsInvestmentIncomeLossNetDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#cmcsa_ELRID_InvestmentsInvestmentIncomeLossNetDetails" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureFilmAndTelevisionCostsFilmAndTelevisionCostsDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#cmcsa_ELRID_FilmAndTelevisionCostsFilmAndTelevisionCostsDetails" />
  <roleRef roleURI="http://www.comcast.com/role/SupplementalFinancialInformationReceivablesDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#cmcsa_ELRID_SupplementalFinancialInformationReceivablesDetails" />
  <roleRef roleURI="http://www.comcast.com/role/DisclosureSupplementalFinancialInformationOperatingCostsAndExpensesExcludingDepreciationAndAmortizationDetails" xlink:type="simple" xlink:href="cmcsa-20120331.xsd#cmcsa_ELRID_SupplementalFinancialInformationOperatingCostsAndExpensesExcludingDepreciationAndAmortizationDetails" />
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/StatementConsolidatedBalanceSheet">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_89" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_90" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_89" xlink:to="Locator_us-gaap_LiabilitiesCurrent_90" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_103" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="Locator_us-gaap_AccountsPayableCurrent_104" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_103" xlink:to="Locator_us-gaap_AccountsPayableCurrent_104" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_105" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedSalariesCurrent" xlink:label="Locator_us-gaap_AccruedSalariesCurrent_106" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_105" xlink:to="Locator_us-gaap_AccruedSalariesCurrent_106" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_107" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="Locator_us-gaap_AccruedLiabilitiesCurrent_108" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_107" xlink:to="Locator_us-gaap_AccruedLiabilitiesCurrent_108" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_109" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtCurrent" xlink:label="Locator_us-gaap_DebtCurrent_110" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_109" xlink:to="Locator_us-gaap_DebtCurrent_110" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_111" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_AccruedParticipationsAndResidualsCurrent" xlink:label="Locator_cmcsa_AccruedParticipationsAndResidualsCurrent_112" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_111" xlink:to="Locator_cmcsa_AccruedParticipationsAndResidualsCurrent_112" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="Locator_us-gaap_LiabilitiesCurrent_113" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="Locator_us-gaap_DeferredRevenueCurrent_114" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesCurrent_113" xlink:to="Locator_us-gaap_DeferredRevenueCurrent_114" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_91" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="Locator_us-gaap_LongTermDebtAndCapitalLeaseObligations_92" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_91" xlink:to="Locator_us-gaap_LongTermDebtAndCapitalLeaseObligations_92" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_93" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesNoncurrent_94" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_93" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesNoncurrent_94" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_95" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="Locator_us-gaap_OtherLiabilitiesNoncurrent_96" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_95" xlink:to="Locator_us-gaap_OtherLiabilitiesNoncurrent_96" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_97" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount" xlink:label="Locator_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_98" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_97" xlink:to="Locator_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_98" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_99" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_100" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_99" xlink:to="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_100" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_115" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_116" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_115" xlink:to="Locator_us-gaap_StockholdersEquity_116" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_119" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="Locator_us-gaap_PreferredStockValue_120" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_119" xlink:to="Locator_us-gaap_PreferredStockValue_120" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_121" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="Locator_us-gaap_AdditionalPaidInCapital_122" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_121" xlink:to="Locator_us-gaap_AdditionalPaidInCapital_122" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_123" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="Locator_us-gaap_RetainedEarningsAccumulatedDeficit_124" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_123" xlink:to="Locator_us-gaap_RetainedEarningsAccumulatedDeficit_124" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_125" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="Locator_us-gaap_TreasuryStockValue_126" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_125" xlink:to="Locator_us-gaap_TreasuryStockValue_126" order="4.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_127" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_128" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_127" xlink:to="Locator_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_128" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="Locator_us-gaap_StockholdersEquity_129" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockValue" xlink:label="Locator_us-gaap_CommonStockValue_130" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquity_129" xlink:to="Locator_us-gaap_CommonStockValue_130" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_117" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterest" xlink:label="Locator_us-gaap_MinorityInterest_118" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_117" xlink:to="Locator_us-gaap_MinorityInterest_118" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="Locator_us-gaap_LiabilitiesAndStockholdersEquity_101" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="Locator_us-gaap_DeferredRevenueNoncurrent_102" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_LiabilitiesAndStockholdersEquity_101" xlink:to="Locator_us-gaap_DeferredRevenueNoncurrent_102" order="7.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_131" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_132" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_131" xlink:to="Locator_us-gaap_AssetsCurrent_132" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_149" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_150" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_149" xlink:to="Locator_us-gaap_CashAndCashEquivalentsAtCarryingValue_150" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_151" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_152" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_151" xlink:to="Locator_us-gaap_AccountsReceivableNetCurrent_152" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_153" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="Locator_us-gaap_DeferredTaxAssetsNetCurrent_154" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_153" xlink:to="Locator_us-gaap_DeferredTaxAssetsNetCurrent_154" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_155" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="Locator_us-gaap_OtherAssetsCurrent_156" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_155" xlink:to="Locator_us-gaap_OtherAssetsCurrent_156" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="Locator_us-gaap_AssetsCurrent_157" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ProgrammingRightsCurrent" xlink:label="Locator_cmcsa_ProgrammingRightsCurrent_158" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AssetsCurrent_157" xlink:to="Locator_cmcsa_ProgrammingRightsCurrent_158" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_133" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="Locator_us-gaap_LongTermInvestments_134" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_133" xlink:to="Locator_us-gaap_LongTermInvestments_134" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_135" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="Locator_us-gaap_PropertyPlantAndEquipmentNet_136" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_135" xlink:to="Locator_us-gaap_PropertyPlantAndEquipmentNet_136" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_137" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IndefiniteLivedFranchiseRights" xlink:label="Locator_us-gaap_IndefiniteLivedFranchiseRights_138" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_137" xlink:to="Locator_us-gaap_IndefiniteLivedFranchiseRights_138" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_139" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Goodwill" xlink:label="Locator_us-gaap_Goodwill_140" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_139" xlink:to="Locator_us-gaap_Goodwill_140" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_141" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherIntangibleAssetsNet" xlink:label="Locator_us-gaap_OtherIntangibleAssetsNet_142" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_141" xlink:to="Locator_us-gaap_OtherIntangibleAssetsNet_142" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_143" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="Locator_us-gaap_OtherAssetsNoncurrent_144" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_143" xlink:to="Locator_us-gaap_OtherAssetsNoncurrent_144" order="7.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_145" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_FilmAndTelevisionCosts" xlink:label="Locator_cmcsa_FilmAndTelevisionCosts_146" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_145" xlink:to="Locator_cmcsa_FilmAndTelevisionCosts_146" order="8.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="Locator_us-gaap_Assets_147" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetNoncurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetNoncurrent_148" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Assets_147" xlink:to="Locator_us-gaap_AccountsReceivableNetNoncurrent_148" order="9.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/StatementConsolidatedStatementOfIncome">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_369" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_370" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_369" xlink:to="Locator_us-gaap_ProfitLoss_370" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_373" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_374" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_373" xlink:to="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_374" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_377" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_378" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_377" xlink:to="Locator_us-gaap_OperatingIncomeLoss_378" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_381" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Revenues" xlink:label="Locator_us-gaap_Revenues_382" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_381" xlink:to="Locator_us-gaap_Revenues_382" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="Locator_us-gaap_OperatingIncomeLoss_383" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_384" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_OperatingIncomeLoss_383" xlink:to="Locator_us-gaap_CostsAndExpenses_384" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_385" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OperatingExpensesExcludingDepreciationAndAmortization" xlink:label="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_386" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_385" xlink:to="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_386" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_387" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Depreciation" xlink:label="Locator_us-gaap_Depreciation_388" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_387" xlink:to="Locator_us-gaap_Depreciation_388" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="Locator_us-gaap_CostsAndExpenses_389" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="Locator_us-gaap_AmortizationOfIntangibleAssets_390" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CostsAndExpenses_389" xlink:to="Locator_us-gaap_AmortizationOfIntangibleAssets_390" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_379" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_380" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_379" xlink:to="Locator_us-gaap_NonoperatingIncomeExpense_380" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_391" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="Locator_us-gaap_InterestExpense_392" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_391" xlink:to="Locator_us-gaap_InterestExpense_392" order="1.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_393" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_394" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_393" xlink:to="Locator_us-gaap_InvestmentIncomeNonoperating_394" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_395" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_396" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_395" xlink:to="Locator_us-gaap_IncomeLossFromEquityMethodInvestments_396" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="Locator_us-gaap_NonoperatingIncomeExpense_397" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="Locator_us-gaap_OtherNonoperatingIncomeExpense_398" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NonoperatingIncomeExpense_397" xlink:to="Locator_us-gaap_OtherNonoperatingIncomeExpense_398" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_375" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_IncomeTaxExpenseBenefit_376" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ProfitLoss_375" xlink:to="Locator_us-gaap_IncomeTaxExpenseBenefit_376" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_371" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_372" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetIncomeLoss_371" xlink:to="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_372" order="2.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/StatementConsolidatedStatementOfCashFlows">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_473" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_474" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_473" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInOperatingActivities_474" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_475" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_476" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_475" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_476" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_445" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_446" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_445" xlink:to="Locator_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_446" order="1.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_447" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="Locator_us-gaap_PaymentsToAcquireIntangibleAssets_448" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_447" xlink:to="Locator_us-gaap_PaymentsToAcquireIntangibleAssets_448" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_449" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="Locator_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_450" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_449" xlink:to="Locator_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_450" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_451" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments" xlink:label="Locator_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_452" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_451" xlink:to="Locator_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_452" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_453" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="Locator_us-gaap_PaymentsToAcquireInvestments_454" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_453" xlink:to="Locator_us-gaap_PaymentsToAcquireInvestments_454" order="5.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_455" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_456" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInInvestingActivities_455" xlink:to="Locator_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_456" order="6.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_477" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_478" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_477" xlink:to="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_478" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_457" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt" xlink:label="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_458" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_457" xlink:to="Locator_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_458" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_459" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromOtherDebt" xlink:label="Locator_us-gaap_ProceedsFromOtherDebt_460" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_459" xlink:to="Locator_us-gaap_ProceedsFromOtherDebt_460" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_461" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfOtherDebt" xlink:label="Locator_us-gaap_RepaymentsOfOtherDebt_462" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_461" xlink:to="Locator_us-gaap_RepaymentsOfOtherDebt_462" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_463" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="Locator_us-gaap_PaymentsForRepurchaseOfCommonStock_464" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_463" xlink:to="Locator_us-gaap_PaymentsForRepurchaseOfCommonStock_464" order="4.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_465" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="Locator_us-gaap_PaymentsOfDividends_466" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_465" xlink:to="Locator_us-gaap_PaymentsOfDividends_466" order="5.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_467" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="Locator_us-gaap_ProceedsFromIssuanceOfCommonStock_468" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_467" xlink:to="Locator_us-gaap_ProceedsFromIssuanceOfCommonStock_468" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_469" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="Locator_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_470" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_469" xlink:to="Locator_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_470" order="7.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_471" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_472" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_NetCashProvidedByUsedInFinancingActivities_471" xlink:to="Locator_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_472" order="8.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/ConsolidatedStatementOfComprehensiveIncome">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_603" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_604" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_603" xlink:to="Locator_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_604" order="1.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_605" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_606" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_605" xlink:to="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_606" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_609" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProfitLoss" xlink:label="Locator_us-gaap_ProfitLoss_610" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_609" xlink:to="Locator_us-gaap_ProfitLoss_610" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_611" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_612" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_611" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_612" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_613" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_614" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_613" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax_614" order="3.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_615" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease_616" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_615" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease_616" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_617" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease_618" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_617" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease_618" order="5.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_619" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_620" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_619" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_620" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_621" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_622" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_621" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax_622" order="7.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="Locator_us-gaap_ComprehensiveIncomeNetOfTax_607" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest" xlink:label="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_608" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_ComprehensiveIncomeNetOfTax_607" xlink:to="Locator_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest_608" order="3.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureEarningsPerShareDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_705" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_706" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_705" xlink:to="Locator_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_706" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_707" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="Locator_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_708" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_707" xlink:to="Locator_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_708" order="2.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureInvestmentsDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Investments" xlink:label="Locator_us-gaap_Investments_727" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MarketableSecurities" xlink:label="Locator_us-gaap_MarketableSecurities_728" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Investments_727" xlink:to="Locator_us-gaap_MarketableSecurities_728" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Investments" xlink:label="Locator_us-gaap_Investments_729" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_EquityMethodInvestmentsInStockAndOther" xlink:label="Locator_cmcsa_EquityMethodInvestmentsInStockAndOther_730" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Investments_729" xlink:to="Locator_cmcsa_EquityMethodInvestmentsInStockAndOther_730" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Investments" xlink:label="Locator_us-gaap_Investments_731" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostMethodInvestments" xlink:label="Locator_us-gaap_CostMethodInvestments_732" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_Investments_731" xlink:to="Locator_us-gaap_CostMethodInvestments_732" order="3.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureNoncontrollingInterestsDetails">
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ChangesFromNetIncomeAttributableToParent" xlink:label="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2191" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="Locator_us-gaap_NetIncomeLoss_2192" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2191" xlink:to="Locator_us-gaap_NetIncomeLoss_2192" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ChangesFromNetIncomeAttributableToParent" xlink:label="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2193" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_IncreaseInAdditionalPaidInCapitalFromIssuanceOfNoncontrollingEquityInterest" xlink:label="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalFromIssuanceOfNoncontrollingEquityInterest_2194" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2193" xlink:to="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalFromIssuanceOfNoncontrollingEquityInterest_2194" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ChangesFromNetIncomeAttributableToParent" xlink:label="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2195" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest" xlink:label="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest_2196" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_ChangesFromNetIncomeAttributableToParent_2195" xlink:to="Locator_cmcsa_IncreaseInAdditionalPaidInCapitalResultingFromPurchaseOfNoncontrollingInterest_2196" order="3.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_2751" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentFederalTaxExpenseBenefit_2752" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_2751" xlink:to="Locator_us-gaap_CurrentFederalTaxExpenseBenefit_2752" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_2753" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_2754" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_2753" xlink:to="Locator_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_2754" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_2755" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="Locator_us-gaap_CurrentForeignTaxExpenseBenefit_2756" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_CurrentIncomeTaxExpenseBenefit_2755" xlink:to="Locator_us-gaap_CurrentForeignTaxExpenseBenefit_2756" order="3.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureIncomeTaxesComponentsOfNetDeferredTaxLiabilityDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_2827" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_2828" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_2827" xlink:to="Locator_us-gaap_DeferredTaxAssetsNet_2828" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_2831" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="Locator_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2832" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_2831" xlink:to="Locator_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2832" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_2833" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="Locator_us-gaap_DeferredTaxAssetsOther_2834" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_2833" xlink:to="Locator_us-gaap_DeferredTaxAssetsOther_2834" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_2835" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther" xlink:label="Locator_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_2836" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_2835" xlink:to="Locator_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_2836" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsNet_2837" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="Locator_us-gaap_DeferredTaxAssetsValuationAllowance_2838" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsNet_2837" xlink:to="Locator_us-gaap_DeferredTaxAssetsValuationAllowance_2838" order="4.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_2829" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="Locator_us-gaap_DeferredTaxLiabilities_2830" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxAssetsLiabilitiesNet_2829" xlink:to="Locator_us-gaap_DeferredTaxLiabilities_2830" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="Locator_us-gaap_DeferredTaxLiabilities_2839" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="Locator_us-gaap_DeferredTaxLiabilitiesOther_2840" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_DeferredTaxLiabilities_2839" xlink:to="Locator_us-gaap_DeferredTaxLiabilitiesOther_2840" order="1.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureInvestmentsInvestmentIncomeLossNetDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_4657" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="Locator_us-gaap_RealizedInvestmentGainsLosses_4658" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_4657" xlink:to="Locator_us-gaap_RealizedInvestmentGainsLosses_4658" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_4659" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="Locator_us-gaap_ImpairmentOfInvestments_4660" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_4659" xlink:to="Locator_us-gaap_ImpairmentOfInvestments_4660" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_4661" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnrealizedGainLossOnSecurities" xlink:label="Locator_us-gaap_UnrealizedGainLossOnSecurities_4662" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_4661" xlink:to="Locator_us-gaap_UnrealizedGainLossOnSecurities_4662" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_4663" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements" xlink:label="Locator_cmcsa_MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements_4664" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_4663" xlink:to="Locator_cmcsa_MarkToMarketAdjustmentOnDerivativeComponentOfPrepaidForwardSaleAgreements_4664" order="4.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_4665" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OtherInvestmentIncomeLossNet" xlink:label="Locator_cmcsa_OtherInvestmentIncomeLossNet_4666" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_4665" xlink:to="Locator_cmcsa_OtherInvestmentIncomeLossNet_4666" order="5.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_4667" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="Locator_us-gaap_InvestmentIncomeInterestAndDividend_4668" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_4667" xlink:to="Locator_us-gaap_InvestmentIncomeInterestAndDividend_4668" order="6.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="Locator_us-gaap_InvestmentIncomeNonoperating_4669" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet" xlink:label="Locator_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_4670" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_InvestmentIncomeNonoperating_4669" xlink:to="Locator_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_4670" order="7.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureFilmAndTelevisionCostsFilmAndTelevisionCostsDetails">
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_TelevisionCosts" xlink:label="Locator_cmcsa_TelevisionCosts_4815" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ReleasedLessAmortization" xlink:label="Locator_cmcsa_ReleasedLessAmortization_4816" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TelevisionCosts_4815" xlink:to="Locator_cmcsa_ReleasedLessAmortization_4816" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_TelevisionCosts" xlink:label="Locator_cmcsa_TelevisionCosts_4817" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_CompletedAndNotReleased" xlink:label="Locator_cmcsa_CompletedAndNotReleased_4818" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TelevisionCosts_4817" xlink:to="Locator_cmcsa_CompletedAndNotReleased_4818" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_TelevisionCosts" xlink:label="Locator_cmcsa_TelevisionCosts_4819" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_InProductionAndInDevelopment" xlink:label="Locator_cmcsa_InProductionAndInDevelopment_4820" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_TelevisionCosts_4819" xlink:to="Locator_cmcsa_InProductionAndInDevelopment_4820" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FilmCosts" xlink:label="Locator_us-gaap_FilmCosts_4809" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ReleasedLessAmortization" xlink:label="Locator_cmcsa_ReleasedLessAmortization_4810" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_FilmCosts_4809" xlink:to="Locator_cmcsa_ReleasedLessAmortization_4810" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FilmCosts" xlink:label="Locator_us-gaap_FilmCosts_4811" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_CompletedAndNotReleased" xlink:label="Locator_cmcsa_CompletedAndNotReleased_4812" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_FilmCosts_4811" xlink:to="Locator_cmcsa_CompletedAndNotReleased_4812" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FilmCosts" xlink:label="Locator_us-gaap_FilmCosts_4813" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_InProductionAndInDevelopment" xlink:label="Locator_cmcsa_InProductionAndInDevelopment_4814" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_FilmCosts_4813" xlink:to="Locator_cmcsa_InProductionAndInDevelopment_4814" order="3.0" weight="1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/SupplementalFinancialInformationReceivablesDetails">
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_4865" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableGrossCurrent" xlink:label="Locator_us-gaap_AccountsReceivableGrossCurrent_4866" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrent_4865" xlink:to="Locator_us-gaap_AccountsReceivableGrossCurrent_4866" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_4867" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ReturnsAndIncentivesAllowance" xlink:label="Locator_cmcsa_ReturnsAndIncentivesAllowance_4868" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrent_4867" xlink:to="Locator_cmcsa_ReturnsAndIncentivesAllowance_4868" order="2.0" weight="-1" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="Locator_us-gaap_AccountsReceivableNetCurrent_4869" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_4870" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_us-gaap_AccountsReceivableNetCurrent_4869" xlink:to="Locator_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_4870" order="3.0" weight="-1" />
  </calculationLink>
  <calculationLink xlink:type="extended" xlink:role="http://www.comcast.com/role/DisclosureSupplementalFinancialInformationOperatingCostsAndExpensesExcludingDepreciationAndAmortizationDetails">
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OperatingExpensesExcludingDepreciationAndAmortization" xlink:label="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4883" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_ProgrammingAndProductionCosts" xlink:label="Locator_cmcsa_ProgrammingAndProductionCosts_4884" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4883" xlink:to="Locator_cmcsa_ProgrammingAndProductionCosts_4884" order="1.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OperatingExpensesExcludingDepreciationAndAmortization" xlink:label="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4885" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_CableCommunicationsTechnicalLabor" xlink:label="Locator_cmcsa_CableCommunicationsTechnicalLabor_4886" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4885" xlink:to="Locator_cmcsa_CableCommunicationsTechnicalLabor_4886" order="2.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OperatingExpensesExcludingDepreciationAndAmortization" xlink:label="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4887" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_CableCommunicationsCustomerService" xlink:label="Locator_cmcsa_CableCommunicationsCustomerService_4888" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4887" xlink:to="Locator_cmcsa_CableCommunicationsCustomerService_4888" order="3.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OperatingExpensesExcludingDepreciationAndAmortization" xlink:label="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4889" />
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MarketingAndAdvertisingExpense" xlink:label="Locator_us-gaap_MarketingAndAdvertisingExpense_4890" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4889" xlink:to="Locator_us-gaap_MarketingAndAdvertisingExpense_4890" order="4.0" weight="1" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OperatingExpensesExcludingDepreciationAndAmortization" xlink:label="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4891" />
    <loc xlink:type="locator" xlink:href="cmcsa-20120331.xsd#cmcsa_OtherOperatingCostsAndExpenses" xlink:label="Locator_cmcsa_OtherOperatingCostsAndExpenses_4892" />
    <calculationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="Locator_cmcsa_OperatingExpensesExcludingDepreciationAndAmortization_4891" xlink:to="Locator_cmcsa_OtherOperatingCostsAndExpenses_4892" order="5.0" weight="1" />
  </calculationLink>
</linkbase>
