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Windows 95B

Windows 95
A version of the Windows 9x operating system
Microsoft Windows 95 Logo.png
Windows 95 at first run.png
Windows 95 desktop, showing its icons and taskbar
Developer Microsoft
Source model Closed source
Released to
manufacturing
August 15, 1995; 22 years ago (1995-08-15)
General
availability
August 24, 1995; 22 years ago (1995-08-24)
Latest release OEM Service Release 2.5 (4.0.950 C) / November 26, 1997; 19 years ago (1997-11-26)
Platforms IA-32
Kernel type Monolithic
License Proprietary commercial software
Preceded by Windows 3.1x (1992)
Succeeded by Windows 98 (1998)
Official website www.microsoft.com
Support status
Mainstream support ended on December 31, 2000
Extended support ended on December 31, 2001

Windows 95 (codenamed Chicago) is a consumer-oriented operating system developed by Microsoft. It was released on August 24, 1995. Windows 95 merged Microsoft's formerly separate MS-DOS and Windows products. It featured significant improvements over its predecessor, Windows 3.1, most notably in the graphical user interface (GUI) and in its simplified "plug-and-play" features. There were also major changes made to the core components of the operating system, such as moving from a mainly co-operatively multitasked 16-bit architecture to a 32-bit preemptive multitasking architecture.

Accompanied by an extensive marketing campaign, Windows 95 introduced numerous functions and features that were featured in later Windows versions, such as the taskbar, the "Start" button and the way the user navigates.

Three years after its introduction, Windows 95 was succeeded by Windows 98. Microsoft ended support for Windows 95 on December 31, 2001.

The initial design and planning of Windows 95 can be traced back to around March 1992, just after the release of Windows 3.1. At this time, Windows for Workgroups 3.11 and Windows NT 3.1 were still in development and Microsoft's plan for the future was focused on Cairo. Cairo would be Microsoft's next-generation operating system based on Windows NT and featuring a new user interface and an object-based file system, but it was not planned to be shipped before 1994. However, Cairo would partially ship in July 1996 in the form of Windows NT 4.0, but without the object-based file system, which would later evolve into WinFS.


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