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1.7 Acronyms and Abbreviations
2G – Second Generation Cellular Technology
3G – Third Generation Cellular Technology
AC/DC – Alternating Current/Direct Current
APN – Access Point Name
CAN – Controller Area Network
DIN – Digital Input
DOUT – Digital Output
FMS – Fleet Management System
HDOP – Horizontal Dilution of Precision
GLONASS – Global Navigation Satellite System
GMT – Greenwich Mean Time
GNSS – Global Navigation Satellite System
GPRS – General Packet Radio Service
GPS – Global Positioning System
GSM – Global System for Mobile Communications
LED – Light Emitting Diode
PCB – Printed Circuit Board
SMS – Short Message Service
TCP – Transmission Control Protocol
UDP – User Datagram Protocol
UMTS – Universal Mobile Telecommunications System
USB – Universal Serial Bus
VCOM – Virtual Communication Port