IBM PC DOS
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IBM PC DOS, also known as IBM DOS or PC DOS, is a discontinued disk operating system for the IBM Personal Computer, its successors, and IBM PC compatibles. It was sold by IBM from the early 1980s into
User manual and diskette for IBM PC DOS 1.1
Retail box of IBM PC DOS 3.30
DOS
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DOS is a family of disk-based operating systems for IBM PC compatible computers. It primarily consists of IBM PC DOS and a rebranded version, Microsoft's MS-DOS, both of which were introduced in 1981.
IBM PC DOS
…identical or almost identical until 1993, when IBM began selling PC DOS 6.1 with its own new features. The collective shorthand for PC DOS and MS-DOS was DOS, which is also the generic term for disk operating system, and is shared with dozens of disk operating systems called DOS. The IBM task force assembled…
The IBM Personal Computer (IBM 5150 PC)