IAS
Indicated Airspeed
TAS
True Airspeed
BALL
Balloons
GLID
Gliders
SHIP
Airship
ULAC
Ultra Light Aircraft
UHEL
Ultra Light Helicopter
GYRO
Gyrocopters
ZZZZ
Unknown AC
PFD
Primary Flight Display
EFIS
Electronic Flight Information System
ND
Navigational Display
MFD
Multi Function Display
TCAS
Traffic Collision Avoidance System
ECAM
Electronic Centralised Aircraft Monitoring (Airbus)
HUD
Heads Up Display
GPWS
Ground Proximity Warning System
EGPWS
Extended Ground Proximity Warning System
FDS
Flight Director System
AFDS
Autopilot Flight Director System
LNAV
Lateral Navigation (guidance)
VNAV
Vertical Navigation (guidance)
CDU
Control and Display Unit
APU
Auxiliary Power Unit