MINIX

Andrew S. Tanenbaum
Professor, Free University, Amsterdam; author of MINIX Unix variant. Full source code. Free for all uses. Small size, microkernel, ample documentation. Users unfamiliar with OS internals can understand nearly the full system with a few months use and study. MINIX inspired Linus Torvalds to do Linux.
http://www.cs.vu.nl/~ast/

Bibliography on Minix, a UNIX-like OS
Part of the Computer Science Bibliography Collection of Alf-Christian Achilles.
http://liinwww.ira.uka.de/bibliography/Os/minix.html

Brad's MacMinix Page
MINIX that runs atop Mac OS. Benefits: while learning about operating systems, its easy to recompile and relaunch, with no rebooting; and to keep OS backups in separate files.
http://www.pliner.com/macminix/

MacMinix
Macintosh version of the UNIX clone Minix.
http://www.pliner.com/MacMinix/

MINIX
This directory and subdirectories contain MINIX, a small Unix-like system for IBM PCs and compatibles.
http://www.cs.vu.nl/pub/minix/

MINIX - Wikipedia
Overview article on the system and its hostory.
http://en.wikipedia.org/wiki/MINIX

Minix Network Service Documentation
Line-by-line comments of source code for TCP/IP networking protocols, network service, for Minix version 2.0.4. By Christos Karayiannis, Andrew Swartzbaugh.
http://www.os-forum.com/minix/net/

Minix on the Net
Documents, help files, hints, links.
http://www.disi.unige.it/person/DoderoG/minix/minix.htm

The Minix Operating System
Major resource of information on, downloads of, and software for, Minix.
http://minix1.woodhull.com/

Minix Tips
Information on how to use and extend Minix 3, and run software on it; website server uses Minix; weblog format, many practical posts.
http://www.minixtips.com/

MINIX.ORG
Repository for OS related: documentation, help, information, news, links, books, source code, downloads. Not the official MINIX website.
http://www.minix.org/

Minix-vmd
Overdressed version of Minix; source, binaries, man pages.
http://www.minix-vmd.org/

Operating Systems Design and Implementation, 3/E
By Andrew S Tanenbaum, Albert S Woodhull; Prentice Hall, 2006, ISBN 0131429388. Revised simplified edition, for latest MINIX version. An OS text which first explains relevant principles, then demonstrate their use via Unix-like OS as a detailed example.
http://www.pearsonhighered.com/educator/academic/product/0,,0131429388,00%2ben-USS_01DBC.html