1BSD

1BSD was Bill Joy's first Berkeley Software Distribution. The README says:

This tape includes sources and binaries for a quantity of UC Berkeley software. The major items on this tape are the instructional Pascal system and the text editor "ex". Other software here includes a modified shell, a new shell, new commands, and a "star trek" game. Machine readable documentation is included for all programs. The "Pascal User's Manual" and the "Ex reference manual" need a phototypesetter if readable copies are to be produced.

The files here come from 1bsd.tar.gz, donated by either Keith Bostic or Kirk McKusick.

For more information about 1BSD, see Twenty Years of Berkeley Unix by Kirk McKusick.