Operating Systems
- 161
 - DragonFly BSD
 - Fork of FreeBSD 4.11, focus: scalability, robustness, and debuggability in several broad system traits, especially threading and symetric multiprocessing, SMP.
 
- 162
 - APOLLO
 - Matthew Dillon personal page: brief introduction, links to projects; software: DIABLO backbone news transit system, DICE Amiga C compile, XMAKE.
 
- 165
 - Wikipedia: DragonFly BSD
 - Encyclopedia article about the Unix-like operating system, including history and future directions.
 
- 166
 - A Quick Review of DragonFly BSD 1.4
 - Concise, with links, forum comments. [OSNews.com] (January 18, 2006)
 
- 167
 - Behind DragonFly BSD
 - Interview of core developers (Matthew Dillon, Joerg Sonnenberger, Jeffrey Hsu, Hiten Pandya) on their goals. [ONLamp.com] (July 08, 2004)
 
- 168
 - Interview with Matthew Dillon of DragonFly BSD
 - Lead developer comments on his goals, with links, forum comments. [OSNews.com] (March 13, 2004)
 
- 172
 - OpenDOS Unofficial Page
 - Descriptions, questions and answers, downloads, mail lists, programming information. Not up-to-date, but has useful information, some of historical interest.
 
- 173
 - The DR-DOS/OpenDOS Enhancement Project
 - Goal: continue development, enhance abilities of, add support for new standards to, extend life of this DOS under open source license. Descriptions, downloads of latest versions: source code, binaries, patches.
 
- 174
 - eCos
 - An open-source real-time operating system for embedded applications. Site includes news, documentation, downloads, FAQ, mailing lists and hardware compatibility details.
 
- 175
 - Code Confidence Ltd
 - Commercial provider of eCos IDE, tools and training services. Site includes technical notes.
 
- 176
 - Wikipedia: eCos
 - Encyclopaedia article about the operating system, with links to many related topics.
 
- 177
 - eCosCentric Limited
 - Commercial provider of eCosPro derivative, porting, training and consultancy services.
 
