semaphore

Both an early form of digital communications and a software mechanism for arbitrating access to a shared resource to avoid contradictory states (in the sense of FSA). Software mechanism devised by Edsger Dijkstra (1930-2002).
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Semaphore

• (n.) A signal telegraph; an apparatus for giving signals by the disposition of lanterns, flags, oscillating arms, etc.
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semaphore

noun an apparatus for visual signaling with lights or mechanically moving arms
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Semaphore

[programming] In computer science, particularly in operating systems, a semaphore is a variable or abstract data type that is used for controlling access, by multiple processes, to a common resource in a parallel programming or a multi user environment. A useful way to think of a semaphore is as a record of how many units of a particular re...
Found on http://en.wikipedia.org/wiki/Semaphore_(programming)

Semaphore

Sem'a·phore noun [ Greek sh^ma a sign + fe`rein to bear: confer French sémaphore .] A signal telegraph; an apparatus for giving signals by the disposition of lanterns, flags, oscillating arms, etc.
Found on http://www.encyclo.co.uk/webster/S/62

Semaphore

a lock mechanism that works per process context, see SMPSynchronisation
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Semaphore

A type of signal that has a moving arm; any signalling using semaphores.
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Semaphore

mechanical signal with a moving arm.
Found on http://www.scot-rail.co.uk/page/Glossary

semaphore

method of visual signaling, usually by means of flags or lights. Before the invention of the telegraph, semaphore signaling from high towers was ... [5 related articles]
Found on http://www.britannica.com/eb/a-z/s/62

semaphore

semaphore (sem'ufôr") , device for the visible transmission of messages. The marine semaphore, used by day between ships or between a ship and the shore, consists essentially of a post at the top of which are two pivoted arms. The arms are connected by light gearing to two operating le...
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Semaphore

Semaphore is a visual form of communication using flags, hence a semaphore is a device in which a flag or board may be raised or lowered so as to exhibit signals to convey information from a distance, such as old-fashioned railway signals.
Found on http://www.probertencyclopaedia.com/browse/AS.HTM

semaphore

semaphore, semaphoric, semiphorical, semaphorically 1. A visual system for sending information by means of two flags that are held one in each hand, using an alphabetic code based on the position of the signaler's arms. 2. Mechanical signaling device: a signaling device for sending information over distances using mechanically operated arms or fla...
Found on http://www.wordinfo.info/words/index/info/view_unit/1930/

semaphore

Visual signalling code in which the relative positions of two movable pointers or hand-held flags stand for different letters or numbers. The system is used by ships at sea...
Found on http://www.encyclo.co.uk/local/20688

semaphore

Visual signalling code in which the relative positions of two movable pointers or hand-held flags stand for different letters or numbers. The system is used by ships at sea and for railway signals
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0009410.html

semaphore

[n] - an apparatus for visual signaling with lights or mechanically moving arms 2. [v] - send signals by or as if by semaphore 3. [v] - convey by semaphore, of information
Found on http://www.webdictionary.co.uk/definition.php?query=semaphore
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