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WinWorld is an online museum dedicated to providing free and open access to one of the largest archives of abandonware software and information on the web.
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Microsoft Windows 1.01 1.xx/1.xy was Compiled on 1985-09-03 by CompuData/Tulip was found BetaArchive. They convinced Microsoft to allow them to ship a pre-release version for Windows 1.00 from September 1985 with their machines. This Beta Build between Premiere Edition and the Final Edition.