<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4/A</documentType><periodOfReport>2003-12-23</periodOfReport><dateOfOriginalSubmission>2003-02-04</dateOfOriginalSubmission><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001171014</issuerCik>
        <issuerName>COSI INC</issuerName>
        <issuerTradingSymbol>COSI</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001209021</rptOwnerCik>
            <rptOwnerName>ZAM HOLDINGS L P</rptOwnerName>
        </reportingOwnerId>
<reportingOwnerAddress><rptOwnerStreet1>c/o PBK Holdings, Inc.</rptOwnerStreet1><rptOwnerStreet2>283 Greenwich Avenue</rptOwnerStreet2><rptOwnerCity>Greenwich</rptOwnerCity><rptOwnerState>CT</rptOwnerState><rptOwnerZipCode>06830</rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001059932</rptOwnerCik>
            <rptOwnerName>PBK HOLDINGS INC</rptOwnerName>
        </reportingOwnerId>
<reportingOwnerAddress><rptOwnerStreet1>283 Greenwich Avenue</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>Greenwich</rptOwnerCity><rptOwnerState>CT</rptOwnerState><rptOwnerZipCode>06830</rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001271455</rptOwnerCik>
            <rptOwnerName>KORSANT PHILIP B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PBK HOLDINGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>283 GREENWICH AVENUE</rptOwnerStreet2>
            <rptOwnerCity>GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-12-23</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1" /></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>826118.0000</value></transactionShares><transactionPricePerShare><value>1.5000</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>5026456.0000</value><footnoteId id="F2" /></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value><footnoteId id="F3" /><footnoteId id="F4" /></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">This transaction represents a purchase of Issuer's Common Stock by ZAM Holdings, L.P. ("ZAM Holdings") pursuant to its obligation under an Investment Agreement, dated as of August 5, 2003.</footnote><footnote id="F2">As of December 23, 2003, ZAM Holdings is the beneficial owner of 5,026,456 shares of the Issuer's Common Stock.  ZAM Holdings owns 2,625,980 shares of such Common Stock directly.  458,937 shares may be obtained upon exercise of warrants previously reported, and 1,941,539 shares may be obtained upon conversion of two convertible notes previously reported.</footnote><footnote id="F3">The securities reported are directly owned only by ZAM Holdings.  PBK Holdings, Inc. ("PBK Holdings"), as the general partner of ZAM Holdings, and Philip B. Korsant ("Korsant"), as the sole shareholder of PBK Holdings, may be deemed indirect beneficial owners under Rule 16a-1(a)(1) of the Securities Exchange Act of 1934, as amended (the "Act"), of securities of the Issuer beneficially owned by ZAM Holdings.  Other than with respect to their direct or indirect ownership interest in ZAM Holdings, PBK Holdings and Korsant are not beneficial owners pursuant to Rule 16a-1(a)(1) of the Act of any securities of the Issuer.</footnote><footnote id="F4">PBK Holdings, as the general partner of ZAM Holdings and as the general partner of certain limited partners of ZAM Holdings, and Korsant, as sole shareholder of PBK Holdings, may be deemed indirect beneficial owners under Rule 16a-1(a)(2) of the Act of securities of the Issuer beneficially owned by ZAM Holdings.  Other than with respect to their direct or indirect ownership interest in ZAM Holdings, PBK Holdings and Korsant are not beneficial owners pursuant to Rule 16a-1(a)(2) of the Act of any securities of the Issuer.

</footnote></footnotes><remarks>This Form 4/A is being filed as a second amendment to the Form 4 filed on February 4, 2003.  A first amendment was filed on November 26, 2003.</remarks><ownerSignature><signatureName>By: /s/ Fred Fogel, Vice President and Secretary of PBK Holdings, Inc., the General Partner of ZAM Holdings, L.P.</signatureName><signatureDate>2003-12-23</signatureDate></ownerSignature><ownerSignature><signatureName>Fred Fogel, Vice President and Secretary of PBK Holdings, Inc.</signatureName><signatureDate>2003-12-23</signatureDate></ownerSignature><ownerSignature><signatureName>Philip B. Korsant</signatureName><signatureDate>2003-12-23</signatureDate></ownerSignature></ownershipDocument>

