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<p>on the <a href="page.php?w=Mac_%28computer%29">Macintosh</a> and Apple II. Apple did not originally call this scheme "GCR", but the term was later applied to it to distinguish it from <a href="page.php?w=IBM_Personal_Computer">IBM PC</a> floppies which used the <a href="page.php?w=Modified_Frequency_Modulation">MFM</a> encoding scheme.|+<b>6-and-2 encoding table</b></p>

<p>Reserved GCR-codes: 0xAA and 0xD5.</p>

<p><big> Commodore </big></p>
<p>Independently, <a href="page.php?w=Commodore_Business_Machines">Commodore Business Machines</a> (CBM) created</p><p>
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