• A Look Back at MS-DOS 4.0. MS-DOS 4.0, released in 1988, introduced several new features and improvements over its predecessors.
  • MS-DOS 4.0x. ... The below versions, as released to the consumer market, are based on DOS 3.3x and IBM's PC-DOS 4.0 enhancements.
  • MS-DOS 4.0 was a multitasking release of MS-DOS developed by Microsoft based on MS-DOS 2.0.
  • MS-DOS 4.00 and 4.01. Addeddate. 2022-04-27 18:54:21. Identifier. ms-dos-4.00-and-4.01. ... Microsoft MS-DOS 4.00 (10-6-1988) (5.25-360k).7z download.
  • Courtesy of PC DOS Retro: Multitasking MS-DOS 4.0 was a little known and separate development of DOS done in parallel with the development of DOS...
  • Microsoft has released the source code for MS-DOS 4.0 and it's giving me all the nostalgia feels. 4 hours ago.
  • Today, in partnership with IBM and in the spirit of open innovation, we’re releasing the source code to MS-DOS 4.00 under the MIT license.
  • Microsoft has released the source code of MS-DOS 4.0(1) on Github. Also older versions previously released are there.
  • MS-DOS 4.00 was released in October 1988. See the PC DOS 4.00 Feature Summary for more details. ... RT-11 4.0. Tapes.