Terms in GSM (Global system for Mobile Communication)

MS : Mobile Station
BSS : Base Station Subsystem
MSS : Mobile Switching Subsystem
OMC: Operation and Maintenance Center
BSC : Base Station Controller
BTS : Base Transceiver Station
MSC : Mobile Switching Center
VLR : Visitor Location Register
HLR : Home Location Register
AUC : Authentication Center
EIR : Equipment Identity Register
SC : Short message Center
SIM : Subscriber Identification Module
SMS: Short Message Service
PIN : Personal Identification Number
PUK : Pin Unlock Key
GPRS : General Packet Radio System
MMS : Multimedia Message Service
MSISDN : Mobile Subscriber Integrated Services Digital Network Number.
IMSI : International Mobile Subscriber Identification Number
MCC : Mobile Country Code
MNC : Mobile Network Code