The first Unix Programmer's Manual, released in 1971 (free PDF) blog.adafruit.com 2 points by sohkamyung 6 days ago · 1 comment Reader PiP Save Collapse all Expand all 1 thread sohkamyungOP 6 days ago PDF of the manual at [1][1] https://dspinellis.github.io/unix-v3man/v3man.pdf