<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType>
	<periodOfReport>2003-07-18</periodOfReport>
	<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000353394</issuerCik>
        <issuerName>SCIENCE APPLICATIONS INTERNATIONAL CORP</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
	</issuer>
	<reportingOwner>
		<reportingOwnerId>
            <rptOwnerCik>0001132794</rptOwnerCik>
            <rptOwnerName>FISHER STEVEN P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
			<isDirector>0</isDirector>
			<isOfficer>1</isOfficer>
			<isTenPercentOwner>0</isTenPercentOwner>
			<isOther>0</isOther>
			<officerTitle>SENIOR VP AND TREASURER</officerTitle>
		</reportingOwnerRelationship>
	</reportingOwner>
	<nonDerivativeSecurity>
		<securityTitle>
			<value>Class A Common Stock</value>
		</securityTitle>
		<transactionDate>
			<value>2003-07-18</value>
		</transactionDate>
		<transactionCoding>
			<transactionFormType>4</transactionFormType>
			<transactionCode>S</transactionCode>
			<equitySwapInvolved>0</equitySwapInvolved>
		</transactionCoding>
		<transactionAmounts>
			<transactionShares>
				<value>1500</value>
			</transactionShares>
			<transactionValue>
				<value>30.5000</value>
			</transactionValue>
			<transactionAcquiredDisposedCode>
				<value>D</value>
			</transactionAcquiredDisposedCode>
		</transactionAmounts>
		<postTransactionAmounts>
			<sharesOwnedFollowingTransaction>
				<value>111096</value>
				<footnoteId id="F1"/>
			</sharesOwnedFollowingTransaction>
		</postTransactionAmounts>
		<ownershipNature>
			<directOrIndirectOwnership>
				<value>D</value>
			</directOrIndirectOwnership>
			<natureOfOwnership>
				<value/>
			</natureOfOwnership>
		</ownershipNature>
	</nonDerivativeSecurity>
	<footnotes>
		<footnote id="F1">The reporting person also indirectly beneficially owns 4,946 shares of SAIC Class A common stock through the SAIC Employee Stock Retirement Plan, 1,268 shares of SAIC Class A common stock in an account for his son,  1,268 shares of SAIC Class A common stock in an account for his daughter, 385 shares of SAIC Class A common stock in an account for his wife, and 4,023 shares of SAIC Class A common stock through the SAIC 401(k) plan.  During the period of April 1, 2003 through June 30, 2003, the reporting person acquired 21 shares of SAIC Class A Common Stock under the SAIC 401(k) Plan.  The balance is pursuant to the reporting person's most recent account statement available.</footnote>
	</footnotes>
	<ownerSignature>
		<signatureName>By: N. Walker, Attorney-in-fact, for</signatureName>
		<signatureDate>2003-07-21</signatureDate>
	</ownerSignature>
</ownershipDocument>

