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.
Internet and Telecommunications Glossary: Glossary with links to additional resources.
Motorola Glossary of Technical Terms: Mobile telephony, cordless phones, and cellular services. Parallel versions in Czech, Danish, Dutch, French, German, Greek, Hungarian, Italian, Portuguese, Romanian, Russian, Slovak, Spanish, Swedish, and Turkish.
Telecom Dictionary: Commonly used telecom terms and their definitions.
Telecommunication Terminology Database: TERMITE contains all the terms which appeared in ITU printed glossaries since 1980.