derivative of an existing weapon system

proportional-integral-derivative / proportional integral derivative (PID)

Guidelines for Realizing Early Benefits from Existing Satellite-Based Navigation System

destruction of existing stockpiles of chemical weapons

retrofit existing equipment

substantial derivative of a hydrodynamic quantity

effective dihedral derivative

material derivative of a hydrodynamic quantity

proportional–integral–derivative controller (PID controller / three-term controller)

symmetrically deflected elevon effectiveness derivative

control derivative

Derivative Method

derivative

Derivative (tech.)

ballistic missile derivative launch vehicle

bomber derivative used as a cruise missile launch platform

derivative classification authority

derivative fighter engine

engine model derivative

engine model derivative program

military derivative of commercial aircraft

oil derivative

proportional-integrative-derivative controller

second derivative method

self-modulating derivative optical spectrometer

proportional–integral–derivative controller / PID Controller / three-term controller

Air Force weapons system / AF weapon system

nuclear weapon; atomic weapon

weapon-counter-weapon pendulum

Wunderwaffe (нім.) (wonder-weapon / miracle weapon)

fire extinguishing system sprinkler system and fire alarm system

Advanced Precision Kill Weapon System (APKWS)

aircraft’s weapon control system