Operating System
- Growing article, with links to many related topics. Wikipedia.
- http://en.wikipedia.org/wiki/Operating_system

Convergence International
- The non-Wintel user group, supporting Acorn, Amiga, Apple, ARM, Be, NCs, PowerPC, Psion, Unix and other alternative operating systems. Services include a non-Wintel news summary.
- http://www.convergence.org/

OSNews: Exploring the Future of Computing
- Weblog style online magazine on operating systems and computing environments. Daily updates, reader forum with many comments.
- http://www.osnews.com/

Internet Operating System Counter
- Statistics on Internet OS use, WWW, FTP, and News servers. Over 940,000 hosts checked in this 1999 survey.
- http://www.leb.net/hzo/ioscount/

Operating System Sucks-Rules-O-Meter
- The web-based operating system quality and approval metric.
- http://srom.zgp.org/

How Stuff Works: Operating Systems
- Unbiased enlightening tutorial with impartial description of how OSs work, and many related links.
- http://www.howstuffworks.com/operating-system.htm