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In page IBM AIX:

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ISC also developed AIX for the IBM RT PC workstation, introduced in January 1986, based on UNIX System V Releases 1 and 2, and incorporating source code from 4.2 and 4.3 BSD UNIX.[9][10] AIX Version 2 followed in 1987 for the RT PC.[11] AIX was also available for the IBM PC AT and IBM PC XT/286.[citation needed]