Timeline – OS (complete)

1981
01 August 1981

MS-DOS 1.0/1.1

MS-DOS 1.0/1.1

The original version of MS-DOS. This was a renamed version of QDOS which had been purchased by an upstart company called Microsoft.

1982
01 August 1982

MS-DOS 1.25

MS-DOS 1.25

MS-DOS 1.25 added support for double-sided disks. Previously the disk had to be turned over to use the other side.

1983
01 March 1983

MS-DOS 2.0

MS-DOS 2.0

MS-DOS 2.0 added support for IBM’s 10 MB hard disk, directories and double-density 5.25″ floppy disks with capacities of 360 KB

01 October 1983

MS-DOS 2.11

MS-DOS 2.11

Support for foreign and extended characters was added.

1984
01 August 1984

MS-DOS 3.0

MS-DOS 3.0

Support for high-density (1.2 MB) floppy disks and 32 MB hard disks was added.

1985
01 March 1985

MS-DOS 3.1

MS-DOS 3.1

This version now supported network and memory above 640 kB !!!

20 November 1985

Windows 1.01

Windows 1.01

Bill Gates said in that time: Windows should be like MAC OS

01 December 1985

MS-DOS 3.2

MS-DOS 3.2

3,5 inch 720 KB floppy support was introduced.

1987
01 April 1987

MS-DOS 3.3

MS-DOS 3.3

This release was written to take advantage of IBM’s PS/2 computer range. It added support for high density 3.5″ floppy disks, more than one partition on hard disks (allowing use of disks bigger than 32 MB) and code pages.

1988
01 November 1988

MS-DOS 4.0

MS-DOS 4.0

This version provided XMS support, support for partitions on hard disks up to 2 GB and a graphical shell. It also contained a large number of bugs and many programs refused to run on it. Very soon version 4.01 was released with bug fixes.

1991
01 June 1991

MS-DOS 5.0

MS-DOS 5.0

This was a major upgrade. It allowed parts of DOS to load itself in the high memory area and certain device drivers and TSRs to run in the unused parts of the upper memory area between 640K and 1024K. This version also added support for IBM’s new 2.88 MB floppy disks. An improved BASIC interpreter and text editor were included,.. weiter lesen...

1993
01 March 1993

MS-DOS 6.0

MS-DOS 6.0

This was a catch-up with Novell’s DR-DOS 6. It added a disk-compression utility called DoubleSpace, a basic anti-virus program and a disk defragmenter. It also finally included a MOVE command, an improved backup program, MSBACKUP and multiple boot configurations. Memory management was also improved by the addition of MEMMAKER. A number of older utilities, such as JOIN and RECOVER were.. weiter lesen...

01 November 1993

MS-DOS 6.2x

MS-DOS 6.2x

Extra security was built into DoubleSpace following complaints of data loss. A new disk checker, SCANDISK, was also introduced, as well as improvements to DISKCOPY and SmartDrive.

1995
01 September 1995

MS-DOS 7.x & 8.x

MS-DOS 7.x & 8.x

These versions are versions which were shipped with Windows. Version 7.0 was shipped with Windows 95 and supported only 2GB HDD (FAT 16) only the Windows 95 version B supported FAT 32 and HDD above 2GB (DOS 7.1). DOS 8.0 is shipped with Windows ME – the last Windows version which needed DOS as basic OS.