Semaphore

lippuviittoilu

(visual system for transmitting information using flags)

opastin

(equipment used for visual signalling)

opastin

(visual system for transmitting information)

opastinjärjestelmä

(visual system for transmitting information)

semafori

(mechanism used to restrict access to a shared function or device to a single process at a time)

viittoa

(to signal using, or as if using, a semaphore)