Os: First Microsoft

In July 1980, IBM approached Microsoft for a secret project code-named . IBM was building its first mainstream personal computer (the IBM PC) and urgently needed an operating system. The Quick Dirty Operating System (QDOS)

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. first microsoft os

Xenix was highly advanced, featuring multi-user and multitasking capabilities. However, it required around 100KB of memory, making it too resource-heavy for early consumer personal computers. In July 1980, IBM approached Microsoft for a

: The entire OS was written in assembly language for maximum efficiency on early hardware. In July 1980