Avenger Air Defense System (AN/TWQ-1)

air defense artillery system

air defense guided missile system (AD GM sys)

integrated air defense system

man portable air defense system (MANPADS)

mobile air defense system

NATO Integrated Air defense System

self-propelled air defense system (SPAD)

theater high altitude air defense (THAAD) system

Medium Extended Air Defense System (MEADS)

Air Defense Anti Tank System (ADATS)

Air Defense Missile System (ADMS)

ground-based air defense system

manual air defense system

Air Force Air Defense Command

perimeter defense (all-around defense)

beach defense mine / beach-defense mine

fire extinguishing system sprinkler system and fire alarm system

Air Force weapons system / AF weapon system

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

coastal defense missile system (mobile) (‘Bastion’)

coastal defense missile system

Defense Integrated Military Human Resource System (DIMHRS)

defense transportation system (DTS)

missile defense weapon system

degradation of radar defense system

radiological defense warning system

air defense (AD)

Air defense and Airspace Management Directorate (NATO)

air defense area

air defense artillery (ADA)