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Development of the famous Microsoft Windows operating system began in 1983, and the system was officially announced on 10 November 1983 in New York. It was then demonstrated at the Fall COMDEX '83 trade show on 29 November 1983.

Finally, the system was released to retail in November 1985, under the name of Windows 1.0.

Builds[]

Development Release

Build number;
Release
Build lab Date Architecture Legitimacy
DR1 - 05/84 x86 (16-bit) Confirmed
DR2 - 06/84 x86 (16-bit) Confirmed
DR3 - 07/84 x86 (16-bit) Confirmed
DR4 - 31/08/84 x86 (16-bit) Confirmed
DR5 - 31/10/84 x86 (16-bit) Leaked

Pre-release

Build number;
Release
Build lab Date Architecture Legitimacy
Alpha - 31/01/85 x86 (16-bit) Leaked
Beta - 08/05/85 x86 (16-bit) Leaked
Premiere Edition - 30/07/85 x86 (16-bit) Leaked
1.xx (Tulip OEM) - 03/09/85 x86 (16-bit) Leaked

Release to manufacturing

Build number;
Release
Build lab Date Architecture Legitimacy
1.01 - 11/85 x86 (16-bit) Leaked
1.02 - 05/86 x86 (16-bit) Leaked
1.03 - 08/86[1] x86 (16-bit) Leaked
1.04 - 04/87 x86 (16-bit) Leaked

References[]

  1. Currently available copies of Windows 1.03 are dated 14/08, 21/08 and 24/08.
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