IBM Disk Operating System Version 3.20 w/ Manual

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IBM Disk Operating System Version 3.20 w/ Manual 5.25 FLOPPY vintage OS! '86 BOX Type: Application Platform: DOS Publisher: IBM Released: 1986 Media: 5.25 Floppy INCLUDES 5.25" DIS C AND THICK HARDBOUND BINDER MANUAL. Manual starts with chapter 3, unsure if that was how it was originally supposed to be?The IBM Disk Operating System (DOS) is the base for thousands of application programs. Extensive facilities for managing data are available for your use. New applications can be developed in a variety of supported programming languages.Disks come untested and sold AS-IS for collectors. For DOS [*Please review compatibility/platform sections in 'What You Get'] Show more