anti - assi
- antitank
- antitank aircraft missile
- antitank fire system
- antitank guided missile
- antitank mine planting
- antitank missile controller
- antitank missile platoon
- antitank rocket launcher
- antitank weapon
- antivehicular ditch
- antivibration tube socket
- aperiodic compass
- aperture
- aperture angle
- aperture function
- aperture response
- aperture size
- apex
- apex angle
- apoapsis
- apogeal velocity
- apogee
- apogee altitude
- apogee argument
- apogee injection velocity
- apogee passage
- apollo logistic support system
- apolune
- apparatus replacing
- apparent acceleration
- apparent brightness
- apparent declination
- apparent distance
- apparent drift of the gyro
- apparent error
- apparent explosion yield
- apparent force
- apparent lift
- apparent magnitude
- apparent mass
