First Microsoft Os -

+-------------------------------------------------------+ | MICROSOFT XENIX (1980) | | - Microsoft's true first commercial OS | | - Licensed from AT&T's UNIX System V | | - Built for multi-user, high-end 16-bit machines | +-------------------------------------------------------+

While popular history attributes MS-DOS as Microsoft's debut operating system, the company's official first shipping OS was actually a Unix distribution called , released in August 1980. first microsoft os

When Paul Allen finally flew to Albuquerque to demonstrate the software, he carried the paper tape containing the code in his pocket. If the software crashed, the gig was up. He loaded the tape into the Altair, held his breath, and hit enter. held his breath