His Lucent page. Central Unix figure, co-creator of Unix, with Ken Thompson; co-inventor of C programming language, with Brian Kernighan. Unix and C history and references.

Bell Labs research group. Contains theories, statistics, reports, and free measurement tools for networks.

By Brian W. Kernighan and Dennis M. Ritchie, the original (revised) and the best book to learn C.

Article by Dennis M. Ritchie. History C programming language.

By Brian Kernighan, Christopher Van Wyk. Compares how fast C, Awk, Perl, Tcl, Java, Visual Basic, Limbo, Scheme, run a range of representative tasks. Text, tables, graphs, code samples.

The original Unix users manual.

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 paid to social conditions during the development of the system."

Ritchie and Thompson's famous Communications of the ACM paper from 1974. An authoritative and technical overview of the operating system.

Archives at Bell Labs of the 1979 manual. Troff source and formatted Gzipped PostScript/PDF versions.

Full text of ruling severing BSD code from commercial Unix.