page_title: MS-DOS
section_title: MS-DOS 2.x
hierarchical_section_title: MS-DOS / Versions / MS-DOS 2.x
caption_attribution_description: English: A boot disk for the Leading Edge Model D PC
context_page_description: MS-DOS is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and some 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 compatible personal computers during the 1980s, from which point it was gradually superseded by operating systems offering a graphical user interface, in various generations of the graphical Microsoft Windows operating system.
  IBM licensed and re-released it in 1981 as PC DOS 1.0 for use in its PCs. Although MS-DOS and PC DOS were initially developed in parallel by Microsoft and IBM, the two products diverged after twelve years, in 1993, with recognizable differences in compatibility, syntax, and capabilities.
  During its lifetime, several competing products were released for the x86 platform, and MS-DOS went through eight versions, until development ceased in 2000. Initially, MS-DOS was targeted at Intel 8086 processors running on computer hardware using floppy disks to store and access not only the operating system, but application software and user data as well.
context_section_description: Support for IBM's XT 10 MB hard disk drives, support up to 16 MB or 32 MB FAT12 formatted hard disk drives depending on the formatting tool shipped by OEMs, user installable device drivers, tree-structure filing system, Unix-like inheritable redirectable file handles, non-multitasking child processes an improved Terminate and Stay Resident (TSR) API, environment variables, device driver support, FOR and GOTO loops in batch files, ANSI.SYS.
  Version 2.0 (OEM), First version to support 5.25-inch, 180 KB and 360 KB floppy disks; Release date: October, 1983
  Version 2.02 (OEM, Compaq); Release date: November, 1983
  Version 2.05 (OEM, international support); Release date: October, 1983
  Version 2.1 (OEM, IBM only)
  Version 2.11 (OEM)
  Altos MS-DOS 2.11, an Altos OEM version of MS-DOS 2.11 for the ACT-86C
  ITT Corporation ITT-DOS 2.11 Version 2 (MS-DOS 2.11 for the ITT XTRA Personal Computer); Release date: July, 1985
  Toshiba MS-DOS 2.11 in ROM drive for the model T1000 laptop
  TeleVideo PC DOS 2.11, a TeleVideo OEM version of MS-DOS 2.11
  Version 2.13 (OEM, Zenith); Release date: July, 1984
  Version 2.2 (OEM, with Hangeul support)
  Version 2.25 (OEM, with Hangeul and Kanji support)
caption: MS-DOS 2.11 boot disk for the Leading Edge Model D in its sleeve
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