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).
|Source model||Mixed; primarily closed-source, some versions open-source|
|Initial release||28 May 1988|
|Latest release||7.01.08 / 21 July 2011|
|Available in||English, older versions also in German, French, Italian, Spanish, Japanese|
|Kernel type||Monolithic kernel|
|Command-line interface (COMMAND.COM)|
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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