Find what the following terms stand for
ITU, UMTS, PCS, GSM, ISDN, PSTN, TDMA, FDMA, CDMA, AMPS,
CDPD, GPRS, EDGE in GSM, WAP, ISM band
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ITU ? International Telecommunication Union
UMTS ? Universal Mobile Telecommunication Service
PCS ? Personal Communications Services
GSM ? Global System for Mobile Communication
ISDN ? Integrated Services Digital Network
PSTN - Public Switched Telephone Network
TDMA ? Time Division Multiple Access
FDMA - Frequency Division Multiple Access
CDMA ? Code-Division Multiple Access
AMPS ? Advanced Mobile Phone Service
CDPD ? Cellular Digital Packet Data
GPRS ? General Packet Radio Services
EDGE ? Enhanced Data for GSM Evolution (or: Enhanced Data
GSM Environment)
WAP ? Wireless Application Protocol
ISM ? Industrial, Scientific, and Medical band
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WiFi Protocols 
