A/C: Aircraft
A/I: Anti Ice
A/T: Auto Throttle
AAL: Above Airport Level
AB: Airbrakes
ACCU: Accumulator
ACP: Audio Control Panel
ADC: Air Data Computer
ADF: Automatic Direction Finder
ADI : Attitude Director Indicator
ADM: Air Data Module
ADS: Air Data System
AFCS : Automatic Flight Control System
AFM: Airplane Flight Manual
AFU: Artificial Feel Unit
AGL: Above Ground Level
AGM : Advanced Graphics Module
AHC: Attitude Heading Computer
AHRS : Attitude Heading Reference System
AHS: Attitude Heading System
AIL: Aileron
ALT: Altitude
ANTICOL: Anticollision
AOA: Angle Of Attack
AP: Auto Pilot
APP: Approach
APR: Automatic Power Reserve
ASEL : Altitude Select
AT: Auto Throttle
ATA: Actual Time of Arrival
ATC: Air traffic Control
ATT: Attitude
AUTO : Automatic
AUX: Auxiliary
B/C: Back Course
B-RNAV: Basic RNAV
BAG : Baggage
BAT: Battery
BKUP : Backup