history of bourne shell, almquist shell and various unix stuff.
Witness the definitive, irrefutable, immutable ranking of the most brilliant software programs ever hacked.
The Linux Hater's Blog. Great fun, "in a way that xkcd is funny to Unixers. Whoever is writing that blog has extensive experience on Linux and enviable writing skills." --Miguel de Icaza
Some hackers have too much time. This one has re-implemented the classic Unix command line editor vi in Javascript. (via hugo)
The Process File System and Process Model in UNIX System V
Roger Faulkner, Sun Microsystems; Ron Gomes, AT&T Laboratories