Groupe Spéciale Mobile (GSM)
- The European standards group for wireless connectivity
- Digital cellular telephone standard developed by the European Telecommunications Standards Institute's (ETSI) Groupe Spécial Mobile. Also used in some Middle Eastern countries and parts of Australia. The frequencies allocated to the service are divided into 200-kHz blocks, each of which supports eight simultaneous users (by using a form of TDMA that lets a handset transmit a few bytes of data or digitized voice, 217 times per second).