DR-DOS
   Growing article, with links to many related topics. Wikipedia.
   http://en.wikipedia.org/wiki/DR-DOS

DR-DOS Wiki
   Information of many types on DR-DOS, Enhanced DR-DOS, OpenDOS, NovellDOS.
   http://www.unet.univie.ac.at/~a0503736/php/drdoswiki/

DRDOS, Inc.
   Makes: DR-DOS, compact, Y2K safe, good for embedded or thin-client systems, source code available, development kits, older and localized versions; and DRLX embedded Linux, load and run Linux programs from DR-DOS.
   http://www.drdos.com/

OpenDOS
   Growing article, with links to many related topics. Wikipedia.
   http://en.wikipedia.org/wiki/OpenDOS

OpenDOS Stuff
   News, FAQ and mail archives.
   http://www.delorie.com/opendos/

OpenDOS Unofficial Page
   Descriptions, Q&A, downloads, mail lists, programming information. Not up-to-date, but has useful information, some of historical interest.
   http://www.deltasoft.com/opendos.htm

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.
   http://www.drdosprojects.de/

Unofficial DR-DOS Resources
   Links, install and use tips, FAQ; mail lists, newsgroups, fora; downloads: images, source code; tools.
   http://www.drdos.net/