Copyright, patent, contract, royalty, warranty, damage, disclaimer. BSD/MIT, Free Software, Open Source. Free, public domain, permissive, protective (copyleft, share-alike).

Unix philosophy. Software tools. Simple is beautiful. DOTADIW, KISS. Minimal, simple, clear. Modular, reusable, testable, quick. Free, unrestricted, customizable.

Original Unix, BSD, GNU, and Linux books, papers, videos, and similar materials.

Unix, BSD, GNU, Linux, IT. Mailing lists, TUHS, COFF, IH, RISKS. BOFH, UGU. HCoop, SDF. IRC.

Unix history. CTSS, BTS, Multics, ITS, Unix, C, BSD, Unix wars, Motif, CDE, Plan 9, Inferno, GNU, Linux. AT&T, Bell Labs, CSRG, UCB, Sun Microsystems, Novell.