MS-DOS or Microsoft Disk Operating System was the Microsoft-marketed version of the first widely-installed operating system in personal computers. It was essentially the same operating system that Bill Gates's young company developed for IBM as Personal Computer - Disk Operating System (PC-DOS). Most users of either DOS system simply referred to their system as Disk Operating System. Like PC-DOS, MS-DOS was (and still is) a non-graphical line-oriented command-driven operating system, with a relatively simple interface but not overly "friendly" user interface.
The first Microsoft Windows operating system was really an application that ran on top of the MS-DOS operating system. Today, Windows operating systems continue to support DOS (or a DOS-like user interface) for special purposes by emulating the operating system.
Version of MS-DOS are :
MS-DOS 1.x
- Version 1.12 (OEM) - Compaq release of PC-DOS 1.10
- Version 1.25 (OEM) - Microsoft repackaging of PC-DOS 1.10
MS-DOS 2.x - Support for 10 MB Hard Disk Drives and tree-structure filing system
- Version 2.0 (OEM)
- Version 2.1 (OEM)
- Version 2.11 (OEM)
- Version 2.2 (OEM)
- Version 2.21 (OEM)
MS-DOS 3.x
- Version 3.0 (OEM) - Support for larger Hard Disk Drives
- Version 3.1 (OEM) - Support for Microsoft Networks
- Version 3.2 (OEM)
- Version 3.21 (OEM)
- Version 3.25 (OEM)
- Version 3.3 (OEM)
- Version 3.3a (OEM)
- Version 3.3r (OEM)
- Version 3.31 (OEM) - Compaq 3.31 supports FAT16 and larger drives.
- Version 3.35 (OEM)
MS-DOS 4.x - includes a graphical/mouse interface.
- Version 4.01 (OEM) - IBM patched Version 4.00 before Microsoft released it.
MS-DOS 5.x
- Version 5.0 (Retail) - includes a full-screen editor. A number of bugs required reissue.
- Version 5.0a (Retail) - With this release, IBM and Microsoft versions diverge.
- Version 5.0.500 (WinNT) - All Windows NT 32-bit versions ship with files from DOS 5.0
MS-DOS 6.x
- Version 6.0 (Retail) - Online help through QBASIC. Disk compression and antivirus included.
- Version 6.2 (Retail) - Microsoft and IBM alternate versions, IBM has 6.1, 6.3
- Version 6.21 (Retail) - Stacker-infringing DBLSPACE removed.
- Version 6.22 (Retail) - New DRVSPACE compression.
MS-DOS 7.x
- Version 7.0 (Win95,95A) - Support for long file names. New editor.
- Version 7.1 (Win95B-Win98SE) - Support for FAT32 file system
MS-DOS 8.0
- Version 8.0 (WinME) - Integrated drivers for faster Windows loading.
- Version 8.0 (WinXP) - DOS boot disks created by XP and later contain files from WinME. The internal DOS is still 5.0
Microsoft DOS was released through the OEM channel, until DRI released DR-DOS 5.0 as a retail upgrade. With PC-DOS 5.00.1, the IBM-Microsoft agreement started to end, and IBM entered the retail DOS market with IBMDOS 5.00.1, 5.02, 6.00 and PC-DOS 6.10, 6.30, 7.00 and 2000.
A number of beta versions have surfaced on the Internet, such as 5.0 (a ten-diskette version in the same vein as 4.0), 7.00 beta 1 (based on 6.00), 7.00 beta 2 (based on 6.22). An OEM source package for 6.00, and a late release of 6.2(b) have also been seen. These are not retail versions.
Download Boot Disk for MS DOS
MS DOS 5.0_bootdisk.iso
MS DOS 6.0_bootdisk.iso
MS DOS 6.21_bootdisk.iso
MS DOS 6.22_bootdisk.iso
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