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Microsoft Posts Source Code For MS-DOS and Word For Windows

March 26, 2014

Microsoft Posts Source Code For MS-DOS and Word For Windows – March 25, 2014 at 08:17PM

An anonymous reader writes "Microsoft, along with the Computer History Museum, has posted the source code for MS-DOS 1.1 and 2.0, and Word for Windows 1.1a. It’s been a long time coming — DOS 2.0 was released for IBM PCs in 1983, and Word for Windows 1.1a came out in 1990. The museum, with Microsoft’s consent, has made the code available for non-commercial use. They’ve also explained some of the history of this software’s development: ‘[In August, 1980], IBM had already contracted with Microsoft to provide a BASIC interpreter for the PC, so they asked them to investigate also providing the operating system. Microsoft proposed licensing "86-DOS", which had been written by Tim Paterson at Seattle Computer Products (SCP) for their 8086-based computer kit because the 16-bit version of CP/M was late. When SCP signed the licensing deal [7] with Microsoft, they didn’t know for sure who the computer manufacturer was. Paterson said "We all had our suspicions that it was IBM that Microsoft was dealing with, but we didn’t know for sure." [1] He left SCP to work for Microsoft in 1981. "The first day on the job I walk through the door and ‘Hey! It’s IBM.’" Microsoft originally licensed 86-DOS in December 1980 for a flat fee of $25,000. By the next summer they recognized the importance of owning it and being able to license it to other companies making IBM-PC clones, so they purchased all rights for an additional $50,000.’"

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