SMS Terminology

API Access Point Identifier alt. Application Programming Interface
APN Access Point Name
BS Billing System
BSC Base Station Controller
BSS Base Station System
BTS Base Transceiver Station
DP5 SmartTrust Delivery Platform generation 5
ESME ESME External Short Message Entity
GMSC GMSC Gateway Mobile Switching Centre
GSM GSM Global System for Mobile communications
HDLC High-level Data Link Control
HLR Home Location Register
LA Location Area
MMS Multimedia Messaging Service alt. More Messages to Send
MO Mobile Originating (about traffic)
MS Mobile Station
MSC Mobile Switching Centre
MSISDN Mobile Station Integrated Services Digital Network
MT Mobile Terminal alt. Mobile Terminating (about traffic)
PCU Packet Control Unit
PDA Personal Data Assistant
PDP Packet Data Protocol
PDU Protocol Data Unit
PLL Physical Link Layer
PPP Point-to-Point Protocol
QoS Quality of Service
RA Routeing Area
RAC Routeing Area Code
SAT SIM Application Toolkit
SC Service Centre (for Short Messaging)
SDK Software Development Kit
SDU Service Data Unit
SIM Subscriber Identity Module
SM Short Message
SMS Short Message Service
SMSC Short Message Service Centre
SSP Service Switching Point
TDMA Time Division Multiple Access
VLR Visiting Location Register
WADP Wireless Application Delivery Platform
WIB Wireless Internet Browser