DR-DOS (written as DR DOS, without a hyphen, in versions up to and including 6.0) is a disk operating system for IBM PC compatibles. Upon its introduction in 1988, it was the first DOS attempting to be compatible with IBM PC DOS and MS-DOS (which were the same product sold under different names).

Quick facts: Developer, OS family, Working state, Source m...
DR-DOS
DeviceLogics DR-DOS 8.0
Developer
OS familyDOS
Working stateDiscontinued
Source modelMixed; primarily closed-source, some versions open-source
Initial release28 May 1988; 34 years ago (1988-05-28)
Latest release7.01.08 / 21 July 2011; 11 years ago (2011-07-21)
Available inEnglish, older versions also in German, French, Italian, Spanish, Japanese
Platformsx86
Kernel typeMonolithic kernel
Default
user interface
Command-line interface (COMMAND.COM)
LicenseProprietary
Official websitedrdos.com (dead since 2018)
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DR-DOS was developed by Gary A. Kildall's Digital Research and derived from Concurrent PC DOS 6.0, which was an advanced successor of CP/M-86. As ownership changed, various later versions were produced with names including Novell DOS and Caldera OpenDOS.

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