3Com Networking Glossary
Search for computer, data communications, and telecommunications definitions.
Acronym and Abbreviation List
From University College Cork; there are no definitions but there are acronym expansions so the list is a valuable tool.
CSR Acronym Definitions
Communications Standards Review offers this list of acronym expansions.
FORE - List of Acronyms
This acronym expansion list includes many that are specific to ATM.
IBM Dictionary of Computing
Extensive reference covering communications as well as computing.
Satellite Terms Glossary
Definitions for satellite transmissions including video and data communications.
TechEncyclopedia
Over 13,000 definitions of computer terms and concepts from CMP's TechWeb.
Whatis.com
Definitions on thousands of the most current IT and Computer related words.