Windows operating system and their versions timeline

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 WINDOWS OPERATING SYSTEM





Microsoft Windows (or simply Windows) is a meta family of graphical operating systems developed, marketed, and sold by Microsoft. 

It consists of several families of operating systems, each of which cater to a certain sector of the computing industry.

The Windows operating system is developed and maintained by Microsoft, the company founded by Bill Gates. 

The first version was released in 1985. Since then, it has grown significantly, and it now dominates the market. 

Windows uses a graphical user interface to make it easier for people to use their computers. 

The primary ways that people navigate are through icons on the desktop and the Start menu.

As of April 2014, the most recent versions of Windows for personal computers, smartphones, server computers and embedded devices are respectively Windows 8.1, Windows Phone 8.1, Windows Server 2012 R2 and Windows Embedded 8. A specialized version of Windows runs on the Xbox  One game console.

The next version of Windows is Windows 10 and is currently available as a technical preview; it is set for release for phones, tablets, laptops, and PCs in late 2015.

However, versions of Windows operating system with its date of release are as below.

Date Version
  • 1981 Sept. Interface Manager
  • 1983 Windows was announced
  • 1985 Nov. Windows 1.0 for 8088 CPUs released
  • 1987 Dec. Windows 2.0 for 386 CPUs, up to 16 mbyte RAM addressable
  • 1988/89 Windows 2.1 for 286/386
  • 1990 Windows 3.0
  • 1992 April 3.1 (janus) includes MS-DOS 5.0
  • 1993 Nov. Windows for Workgroups 3.11 (snowball) rudimentarily networkable
  • 1995 Aug. Windows 95 4.0 Codename "Chicago" was released
  • 1996 Feb. Windows 95 Version A (OSR1)
  • 1996 Aug. Windows 95 (detroit) Version B (OSR2) first time with FAT-32 support
  • 1997 April Windows 95 Version B (OSR2.1)
  • 1997 Nov. Windows 95 Version C (OSR2.5)
  • 1998 June Windows 98 (memphis) about 5,000 bugs fixed
  • 1999 May Windows 98 SE (Second Edition)
  • 2000 Sept. Windows Me (Millenium)
  • 1980 Aug. XENIX OS cooperation with SCO
  • 1982 Feb. XENIX 2.3 cooperation with SCO
  • 1983 April XENIX 3.0 cooperation with SCO
  • 1987 MS OS/2 1.0 cooperation with IBM
  • 1988 OS/2 1.1 cooperation with IBM
  • 1991 OS/2 1.3 cooperation with IBM
  • 1992 OS/2 2.0 cooperation with IBM
  • 1993 July Windows NT 3.1 & Advanced Server; 3.1 million lines of source code, supports HPFS
  • 1994 Sept. Windows NT 3.5 (daytona), Workstation and Server, with opengl and
  • Netware client; 9 million lines of source code
  • 1995 May Windows NT 3.51, update, transparent compression with NTFS file
  • system, PCMCIA support, for Power-PCs available too
  • 1996 Aug. Windows NT 4.0 (cairo) 16 million lines of source code, no support for HPFS anymore
  • 1996 Windows NT Terminal Server Edition (hydra)
  • 1997 Windows NT Server 4.0 Enterprise Edition
  • 1998 Windows NT Server 4.0 Terminal Server Edition
  • 2000 Feb. Windows 2000, Windows version 5.0; 30 million lines of source code, about 10,000 bugs fixed
The new and latest version is now Windows 11 

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