You need to study other people's work. Their approaches to problem solving and the tools they use give you a fresh way to look at your own work. - Gary Kildall

He is divisive. He is manipulative. He is a user. He has taken much from me and the industry.

The first commercial licensing of took place in 1975 with contracts between Digital Systems and for use in their intelligent terminal, and with where CP/M was used to monitor programs in the Octopus network. Little attention was paid to CP/M for about a year. In my spare time, I worked to improve overall facilities... By this time, CP/M had been adapted for four different controllers.... In 1976, approached me with a problem: Imsai, Incorporated, for whom Glenn consulted, had shipped a large number of disk subsystems with a promise that an operating system would follow. I was somewhat reluctant to adapt CP/M to yet another controller, and thus the notion of a separated Basic I/O System (BIOS) evolved. In principle, the hardware dependent portions of CP/M were concentrated in the BIOS, thus allowing Glenn, or anyone else, to adapt CP/M to the Imsai equipment. Imsai was subsequently licensed to distribute CP/M version 1.3 which eventually evolved into an operating system called

The ALGOL compiler was probably one of the nicest pieces of code to come out at that time. I spent hours trying to fix and change the compiler. Working with it so closely affected the way I think about programming and had a profound influence on my style.