Below are some useful links about Directories on Operating Systems:
| Alternative OSs on the Net - A list of operating systems and OS link sites. |
| A Catalog of Operating Systems - Classified, alphabetic listing of most operating systems, past and present, distributed commercially or reported in English-language literature, platform oriented. From Computer Science 258, West Virginia University. |
| Microcomputer Operating Systems - Some 70 OSs that run on microcomputers, PCs. User interfaces in earlier systems are command-line, character-oriented; later systems are mostly GUI-based. List, with brief descriptions, no links. From West Virginia University. |
| Open Source Ring - Alphabetized list of many links, OSs, projects. |
| Paul Hsieh OS Page - Loosely categorized list of about 100 links to developer resources for creating OSs, emulators, alternative OSs. |
Cadence Web Directory is the leading web directory for Australian and International listings for businesses and highly recommended, top quality websites. The content of this page about Operating Systems Directories is based on the ODP.