The development of Windows 95 (codenamed Chicago) began around March 1992, [1] [2] [3] 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 at Microsoft. Windows 95 was eventually released to manufacturing on July 14, 1995, and generally to retail on August 24, 1995.