CSRG Archive CD-ROMs
The full source archives of the University of California at Berkeley's Computer Systems Research Group, for sale on a 4-CD set.
Dennis Ritchie's Home Page
Several historic technical reports, anecdotes, and stories from one of the fathers of Unix.
History of the BSD Daemon
Various drawings, pictures, and information on the red devil BSD mascot.
History of Unix, Linux, and Open Source
Historical comparison of Unix and the free software movement.
Nick Moffitt's $7 History of Unix
History paper detailing the people and places involved in developing Unix.
The Evolution of the Unix Time-Sharing System
1979 conference paper by Dennis Ritchie. "Concentrates on the evolution of the file system, the process-control mechanism, and the idea of pipelined commands. Some attention is pai…
The Unix Heritage Society
Built to foster the "the preservation and maintenance of historical and non-mainstream UNIX systems." Mailing list and archives. Includes early Unix source code, from 1973 through …
The UNIX Time-Sharing System
Ritchie and Thompson's famous Communications of the ACM paper from 1974. An authoritative and technical overview of the operating system.
Unix Programmer's Manual, Seventh Edition
Archives at Bell Labs of the 1979 manual. Troff source and formatted Gzipped PostScript/PDF versions.