обчислювач
aiming rule
declination aiming circle (declinated aiming circle)
aiming dot; aiming mark; crosshair; crosswires; pointing mark; telescope laying mark
aiming lamp / aiming light
aiming post lamp / aiming post light
mil rule / scale
rule of law
slide rule
strong-arm rule
alidade rule
gun rule
decision rule
Prandtl-Glauert rule
rule
rule-making
nautical slide rule
parallel rule(r)
one half thickness rule
safe pocket rule
mil rule
radiation slide rule
air traffic control operator
control tower operator
early warning system (EWS) operator
identification operator
operator control unit (OCU)
operator maintenance
operator’s pack
operator's permit
ship operator
telephone operator
radio telephone operator (RTO)