IBM Dictionary of Computing
Extensive reference covering communications as well as computing.

Glossary of Telecommunications Terms
This 1996 hypertext version of Federal Standard 1037c contains concise and thorough definitions; many include links to detailed graphics (ex.electromagnetic spectrum).

Whatis.com
Definitions on thousands of the most current IT and Computer related words.

Acronym and Abbreviation List
From University College Cork; there are no definitions but there are acronym expansions so the list is a valuable tool.

HEI Telecommunications Acronyms and Related Terms Glossary
Telecommunications and teleconferencing terms.

A Glossary of Telecommunications Terms, 1998
From the FCC, this listing is available in PDF format.

NPSTC Glossary
A resource from the National Public Safety Telecommunications Council.

Glossary of Multilayer Switching Terms and Standards
Business Communications Review houses this reference, but the information is provided and maintained by the Networking Products division of Anritsu Company.

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.

Electrodata Telecom Acronyms
A list of telecommunications acronyms related primarily to digital transport systems, SS7, and wireless.

Glossary of Networking Terms
Majority of terms are from Internet RFC1392 document of January 1993, based on Internet RFC1208 document of March 1991, itself adapted from "The INTEROP Pocket Glossary of Networking Terms" distributed at Interop '90.

IBH Networking Glossary
Includes some networking term definitions and some telecommunications acronym expansions.

TekMom's Technology Buzzwords for Students
A dictionary of computer terms designed for students aged elementary and up. Contains definitions, further explanations, use of words in a sentence, graphics, and links to further information.

Glossary of Academic Information Technology Terms
Consists mostly of computer terminology with some networking and communications basics.

UGeek Technical Glossary
Searchable definitions for computer and communications terms.

3Com Networking Glossary
Search for computer, data communications, and telecommunications definitions.

Telephone and Data Systems, Inc. Glossary
A collection of commonly used telecommunications industry terms defined.

TechEncyclopedia
Over 13,000 definitions of computer terms and concepts from CMP's TechWeb.

Telecommunications Glossary
Terms and acronyms.

Telecommunication Terminology Database
TERMITE contains all the terms which appeared in ITU printed glossaries since 1980.

Allied Telesyn Wireless LAN Glossary
Three pages of terms.

Satellite Terms Glossary
Definitions for satellite transmissions including video and data communications.