active protection system (APS)

Army Prepositioned Stock (APS)

Read protection not active

NBC protection system

nuclear-chemical-biological protection system

Tactical Hearing Protection System (THPS)

Department for Protection of the Constitutional System and the Fight against Terrorism

environment protection system

fire-protection system

zinc anode cathodic protection system

fire protection system

ice protection system

airfoil and cowl ice protection system

Fly-Away Protection System

stall protection system

active denial system

active infrared (IR) guidance system

semi-active homing guidance system

active blade-tip clearance control system

active emitter target auxiliary system

active guidance system

active homing system

Eagle Passive Active Warning Survivability System (EPAWSS)

fire extinguishing system sprinkler system and fire alarm system

antiaircraft protection

antitank protection

armor protection

atomic protection

ballistic protection (armor)

chemical protection equipment (military)

civil protection

Civil Protection Committee (CPC, NATO)

civil protection in emergency situations