DR-DOS is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS that attempted to be compatible with IBM PC DOS and MS-DOS.
Front and rear views of the Carry-I book-sized diskless workstation, bundled with DR DOS 5.0, based on an Intel 80286 processor and produced by Taiwan's Flytech Technology c. 1991
Digital Research DR DOS 6.0 startup disk
Novell DR DOS 6.0 manual
MS-DOS is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PCÂ DOS, and a few operating systems attempting to be compatible with MS-DOS, are sometimes referred to as "DOS". MS-DOS was the main operating system for IBM PC compatibles during the 1980s, from which point it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system.
MS-DOS (Compaq-DOS) version 1.12 (based on MS-DOS 1.25) for Compaq Personal Computer
MS-DOS 3.3C for the PC-9800 series
MS-DOS version 5.0
German MS-DOS 6.2 Update