GGSN: Gateway GPRS Support Node
GMSC: Gateway Mobile Switching Center
GMSK: Gaussian Minimum Shift Keying
GPRS: General Packet Radio Service
GPS: Global Positioning System
GSM: Global System for Mobile Communications
GSN: GPRS Support Node
HLR: Home Location Register
IC: Interchange Carrier
iDEN: Integrated Dispatch Enhanced Network
IMEI: International Mobile Equipment Identifier
IMSI: International Mobile Subscriber Identity
ITU: International Telecommunication Union
IWF: Interworking Function
LBS: Location-Based Services
LMR: Land Mobile Radio
MC: Message Center
MC: Multicarrier Mode
MCS: Mobile Cellular System
ME: Mobile Equipment
MIN: Mobile Identification Number
MIRS: Motorola Integrated Radio system
MSC: Mobile Station Class
MSC: Mobile Switching Center
MTS: Mobile Telephone Service
NAMPS: Narrowband Advanced Mobile Phone Service
NMT: Nordic Mobile Telephone
NPDB: Number Portability Database
NTACS: Narrowband Total Access Communication System
PAD: Packet Assembler And Disassembler
PCM: Pulse Coded Modulation
PCN: Personal Communications Network
PCS: Personal Communication Services
PDA: Personal Digital Assistant
PDC: Personal Digital Cellular
PDSN: Packet Data Switched Network
PM: phase modulation
PM: pulse modulation
PN: Packet Number
PN: pseudorandom noise