controller clearance

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

terminal attack controller (TAC) (= forward air controller)

air controller

controller (exercises)

fighter controller

forward air controller (FAC)

Special Operations Terminal Attack Controller (SOTAC)

tactical air controller

joint terminal attack controller (JTAC)

forward air controller (airborne) FAC(A)

forward air controller party

ground-based forward air controller

heliborne forward air controller

brake controller

combat controller

Controller Interceptor Trainer (CIT)

fluid-operated controller

differential pressure controller

pressure ratio controller

propeller speed controller

altitude controller

track controller

side-stick controller

controller

interception controller

airborne forward air controller

sector controller

radar controller

air traffic controller (ATCo)

airborne drone controller

electronic speed controller (ESC)

ground controller