Most of you might have heard or seen a lot of these abbreviations on different occasions but a good number of you never even had an idea what they meant.
Note these, cause your school teacher might ask you in class one day:
GSM: Global system for mobile communications
PMB: Per munite billing
SIM: Subscribers identification module
DC: Direct current
BAIC: Barring of all incoiming calls
IDD: International direct dialling
PIN: Personal identification number
BI: Basic information
OSS: Operation and support sub-system
HLR: Home location register
SMS: Short message service
ISDN: Integrated service digital network
PC: Personal computer
PUK: PIN unblocking keys
PTC: Private telecommunications center
MRF: Mobile radio frequency
IMEI: International mobile equipment identity
CUG: Close users group
MCC: Mobile country code
CW: Call waiting
WAP: Wireless application protocol
PSB: Per second billing
MMS:Multimedia message
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