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

<documentType>4</documentType>
	<periodOfReport>2003-05-09</periodOfReport>
	<notSubjectToSection16>0</notSubjectToSection16>
<issuer>		<issuerCik>0000353394</issuerCik>
        <issuerName>SCIENCE APPLICATIONS INTERNATIONAL CORP</issuerName>
<issuerTradingSymbol>N/A</issuerTradingSymbol>
	</issuer>
	<reportingOwner>
		<reportingOwnerId>
			<rptOwnerCik>0001178032</rptOwnerCik>
            <rptOwnerName>DESCH MATTHEW J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
<reportingOwnerRelationship>
			<isDirector>1</isDirector>
			<isOfficer>1</isOfficer>
			<isTenPercentOwner>0</isTenPercentOwner>
			<isOther>0</isOther>
			<officerTitle>CEO TELCORDIA TECHNOLOGIES INC</officerTitle>
		</reportingOwnerRelationship>
	</reportingOwner>
	<derivativeSecurity>
		<securityTitle>
			<value>Stock Option (Right to Buy)</value>
			<footnoteId id="F1"/>
		</securityTitle>
		<conversionOrExercisePrice>
			<value>29.0200</value>
		</conversionOrExercisePrice>
		<transactionDate>
			<value>2003-05-09</value>
		</transactionDate>
		<transactionCoding>
			<transactionFormType>4</transactionFormType>
			<transactionCode>A</transactionCode>
			<equitySwapInvolved>0</equitySwapInvolved>
		</transactionCoding>
		<transactionAmounts>
			<transactionShares>
				<value>4070</value>
			</transactionShares>
			<transactionValue>
				<value>0</value>
			</transactionValue>
			<transactionAcquiredDisposedCode>
				<value>A</value>
			</transactionAcquiredDisposedCode>
		</transactionAmounts>
		<exerciseDate>
			<value>2004-05-09</value>
		</exerciseDate>
		<expirationDate>
			<value>2008-05-08</value>
		</expirationDate>
		<underlyingSecurity>
			<underlyingSecurityTitle>
				<value>Class A Common Stock</value>
			</underlyingSecurityTitle>
			<underlyingSecurityShares>
				<value>4070</value>
			</underlyingSecurityShares>
		</underlyingSecurity>
		<postTransactionAmounts>
			<sharesOwnedFollowingTransaction>
				<value>4070</value>
			</sharesOwnedFollowingTransaction>
		</postTransactionAmounts>
		<ownershipNature>
			<directOrIndirectOwnership>
				<value>D</value>
			</directOrIndirectOwnership>
			<natureOfOwnership>
				<value/>
			</natureOfOwnership>
		</ownershipNature>
	</derivativeSecurity>
	<footnotes>
		<footnote id="F1">The option is exercisable according to the following annual vesting schedule:  20% in years 1, 2 and 3, and 40% in year 4.</footnote>
	</footnotes>
	<ownerSignature>
		<signatureName>By: N. Walker, Attorney-in-fact, for</signatureName>
		<signatureDate>2003-05-09</signatureDate>
	</ownerSignature>
</ownershipDocument>

