MS-DOS
Developed by: MicrosoftLaunched: 1981
Microsoft's version of the most widespread DOS family of operating systems, as it was included in IBM PC compatible computers.
MS-DOS versions
| Year | Ver. |
|---|---|
| 1981 | 1.10When Microsoft purchased the 86-DOS operating system from Tim Paterson in May 1981, it changed its name to MS-DOS but kept the version number. Microsoft licensed it to IBM, which offered it as PC DOS 1.0 in August 1981. It was one of three possible operating systems for the IBM 5150 (IBM PC), along with CP/M-86 and UCSD p-System. |
| 1982 | 1.25It was the first program properly called "MS-DOS" to differentiate itself from the product Microsoft developed for IBM, called PC DOS. The source code consists of just seven source files in 8086 assembler. |
| 1983 | 2.0Version designed for the IBM PC XT computer. It introduced support for hard disk drives. Its source code consists of 100 .ASM files. |
| 1983 | 2.1Designed for the IBM PCjr. Introduced support for medium-density disk drives and ROM cartridges. |
| 1985 | 3.0Designed for IBM PC AT. |
| 1985 | 3.1Marketed as "MS-DOS for networks," it was the first version of DOS compatible with local area networks. |
| 1986 | 3.2Introduced support for 3 1/2-inch, 720 KB floppy disk drives. |
| 1987 | 3.3Designed for the IBM PS/2. It featured support for 3 1/2-inch, 1.44 MB floppy disk drives and extended (not primary) disk partitions. |
| 1987 | 3.31It was designed for Compaq computers. It added support for hard drive partitions larger than 32 MB. |
| 1988 | 4.0It has multitasking support and includes a graphical mouse interface. |
| 1988 | 4.01It introduced support for volume serial numbers. But unlike MS-DOS 4.0, version 4.01 did not include support for multitasking. |
| 1991 | 5.0The first version contained the HIMEM.SYS driver and loaded parts of the operating system into the upper and upper memory areas. It supported up to four primary DOS partitions, although FDISK could not create more than one. And the first version was compatible with floppy disk drives and 3.5-inch, 2.88 MB floppy disks, which did not become popular. |
| 1993 | 6.0Includes disk compression, superior memory optimization, and antivirus. |
| 1993 | 6.2SCANDISK is included as a replacement for CHKDSK and fixes serious bugs in DBLSPACE. |
| 1994 | 6.21This patch removed DBLSPACE which was violating the stacker. |
| 1994 | 6.22Includes new DRVSPACE compression. |
| 1995 | 7Included in the Windows 95 RTM version. |
| 1996 | 7.1Included in Windows 95 OSR2, Windows 95 OSR2.5, Windows 98, and Windows 98SE. |
| 2000 | 8.0Included in Windows ME. |
