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

Argos Press Communications Glossary
Defines key terms used in communications systems. Aimed at managers and engineers who need up-to-date definitions in this fast changing technology.

Telecom Dictionary
Commonly used telecom terms and their definitions.

Internet and Telecommunications Glossary
Glossary with links to additional resources.