air data unit

data storage unit

data-adapter unit

battery coolant unit / battery-coolant unit (BCU)

gear reduction unit / gear-reduction unit

position and navigation unit / position navigation unit (PNU)

pinch (a unit) out of a large unit

air picture data collection

air situation data

air situation data exchange (ASDE)

air data transducer

air data transducer assembly

air data computer system (ADC)

air data

Manual of Air Traffic Services Data Link Application

air data computer

air data system (ADS)

aerial refueling / air refueling / in-flight refueling (IFR) / air-to-air refueling (AAR)

air combat capable helicopter / air-to-air capable helicopter

air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen

air assault infantry unit

air defense fire unit

air filtration unit

Special Operations Air Tasks Unit (SOATU)

air unit

army air photograph interpretation unit

unit air defense

air-flow metering unit

casualty air evacuation unit

air force special operations unit

carrier air unit

air base service unit

air dispatch unit