[sĕḿə-fôŕ, -fōŕ]
(n.)A visual signaling apparatus with flags, lights, or mechanically…
(n.)A visual system for sending information by means of two flags that are…
(tr. & intr.v.)To send (a message) or to signal by semaphore.
Dictionary.com · The American Heritage® Dictionary · See all 3 definitions »
Semaphore (programming) - Wikipedia, the free encyclopedia
In computer science, a semaphore is a protected variable or abstract data type which constitutes the classic method for restricting access to shared resources such as shared memory in a parallel pro...
en.wikipedia.org/wiki/Semaphore_(programming)
Semaphore - Wikipedia, the free encyclopedia
Semaphore may be: Optical-telegraph systems • Semaphore line, a system of long-distance communication based on towers with moving arms • Flag semaphore system • Railway semaphore signal for railroa...
en.wikipedia.org/wiki/Semaphore
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The Semaphore flag signaling system is an alphabet signalling system based on the waving of a pair of hand-held flags in a particular pattern.
www.anbg.gov.au/flags/semaphore.html www.anbg.gov.au/flags/semaphore.html
On this InterNETional Scouting resource site you can find some basic information about semaphore flag signaling, a skill which used to be practiced a lot in Scouting (and maybe it still is, although not everywhere).
inter.scoutnet.org/semaphore/ inter.scoutnet.org/semaphore/
The alphabet is organized in such a way that every horizontal row contains letters with the first (usually left) hand in the same position. Unfortunately for those trying to learn this signaling system, the letters are not exactly in alphabetical order.
inter.scoutnet.org/semaphore/semaphore.html inter.scoutnet.org/semaphore/semaphore.html
Railway semaphore signal - Wikipedia, the free encyclopedia
Source
One of the earliest forms of fixed railway signal is the semaphore . These signals display their different indications to train drivers by changing the angle of inclination of a pivoted 'arm'. Semap...
en.wikipedia.org/wiki/Railway_semaphore_signal
>>> Working on new semaphore-related items ... ; June 2002; Semaphores.com Announcement of CSX Semaphore Auction; Orleans, IN; June 2001, photo by Eric A. Schmelz; ... August 2001: Semaphore News...
www.semaphores.com/ www.semaphores.com/
public class Semaphore extends Object; implements Serializable ... A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each acquire() blocks if necessary until a permit is available, and then takes it. Each release() adds a permit, potentially releasing a blocking acquirer.
java.sun.com/j2se/1.5.0/docs/api/java/util/concurrent/S... java.sun.com/j2se/1.5.0/docs/api/java/util/concurrent/Semaphore.html
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Semaphore