Abbreviations

There are plenty of abbreviations commonly used in the aviation industry. Following table shows some of them and what they mean.
ACFTaircraft
ACKacknowledge (message)
ADEPaerodrome of departure
ADESaerodrome of destination
AFTNAeronautical Fixed Telecommunication Network
AIPAeronautical Information Publication
AISAeronautical Information Service
ALTalternate airport
AOaircraft operator
AOCaircraft operator certificate
ATAactual time of arrival
ATCair traffic control
ATDactual time of departure
CFMUcentral flow management unit
CHGchange
CNLcancellation
CRScourse
CTOTcalculated take-off time
DCTdirect
DOFdate of flight
EEDestimated day of departure
EETestimated elapsed time
EOBDestimated date of flight
EOBTestimated offblock time
ETAestimated time of arrival
ETDestimated time of departure
FIRflight information region
FLTflight
FPLflightplan
HOTAChotel arrangement
IATAInternational Air Transport Association
ICAOInternational Civil Aviation Organisation
IFPSIntegrated Initial Flightplan Processing System
IFPZIntegrated Initial Flightplan Processing System Zone
IFRinstrument flight rules
MNPSminimum navigation performance specifications
MTOWmaximum take off weight
MVTmovement
NEWCTOTnew calculated take-off time
NOTAMnotices to airmen
OPRoperator
PICpilot in command
POBpersons on board
PPRprior permission requested
REQrequest
RFIready for improvement
RMKremark
RNAVarea navigation
RVRrunway visual range
RVSMreduced vertical separation minimum
RWYrunway
SAMslot allocation message
SELCALsellective calling system
SIDstandard instrument departure
SIPslot improvement proposal message
SITASociété Internationale de Télécommunication Aéronautique
SRMslot revision message
STARscheduled time of arrival
STDscheduled time of departure
TCAStraffic alert and collision avoidance system
TWRtower
UIRupper flight information region
UTCcoordinated universal time
VFRvisual flight rules