speed selector

selector lever, fire selector, fire switch, fire selector switch

supersonic speed (exceeds speed of sound / Mach 1)

variable-speed with speed control

instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)

Nr gauge (Nr = speed of rotation) / rotor speed sensor

Motor PWM speed separated from PID speed

rack selector

selector lever / switch

arming range selector

fuel tank selector control

fuel tank selector valve

distributor octane selector vacuum line

job selector

safety lock and fire selector

piston-type selector valve

rotary selector valve

selector valve

spool-type selector valve

wind selector

omni-bearing selector (OBS)

fuel gauge selector

heading selector

indicated airspeed selector

weapon selector

selector

manual target selector

moving target selector

space target selector

target selector

target selector switch

target selector-azimuth

target selector-elevation