Kernighan B UNIX A History And A Memoir 2020

Textbook in PDF format

The fascinating story of how Unix began and how it took over the world. Brian Kernighan was a member of the original group of Unix developers, the creator of several fundamental Unix programs, and the co-author of classic books like "The C Programming Language" and "The Unix Programming Environment."
Contents:
Preface
Bell Labs
Proto-Unix (1969)
First Edition (1971)
Sixth Edition (1975)
Seventh Edition (1976-1979)
Beyond Research
Commercialization
Descendants
Legacy
Sources