History of Unix, Linux, and Open Source
- Historical comparison of Unix and the free software movement. Forms part of a secure programming "how to" guide by David A Wheeler.
- http://www.dwheeler.com/secure-programs/Secure-Programs-HOWTO/history.html

Free Code Graphing Project
- Successor to Rusty Russell's Linux Kernel Graphing Project (lgp), far more optimized than the original, code still in some ways specific to Linux kernel, 2.4 series. Author officially took over maintenance from Russell.
- http://fcgp.sourceforge.net/

A Complete History of Tux
- A history so far of Tux the Linux penguin including how the creature was named and created.
- http://www.sjbaker.org/tux

The Linux Operating System
- A consise abridged history of Linux. The author expands his website to discuss other aspects of Linux such as how it compares with Microsoft products and how the Linux development process works.
- http://cbbrowne.com/info/linux.html

Linux for the PowerPC
- A summary of a part of Macintosh and Linux history, this site covers the history of Linux on Macintosh computers from 1994 to 1999.
- http://gate.crashing.org/doc/ppc/doc003.htm