B0149K3KO4 DOS 5.0 Disk Operating System – 3.5-INCH DISKETTES – NOT CD-ROM – 3.5-INCH DISKETTES – NOT CD ROM – IBM PROGRAMMING FAMILY by IBM

DOS 5.0 Disk Operating System – Version 5.02
Industry Standard – Single Tasking Operating System – More application memory space
Easty to Install – Task Swapper

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