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| Alphabetical | By Popularity (What's This?) | | - Built With Processing: Semaphore
 - Java applet which acts as a handy translator for anyone who wants to send a message in semaphore without memorizing it. - Chappe Telegraph Systems
- Discusses Claude Chappe d'Auteroche's 18th century optical telegraph that used semaphore to communicate.
- Origin of the Railway Semaphore
- Examines how railway signals and semaphore evolved from the optical telegraph.
- San Jose Semaphore
- Permanent public artwork by Ben Rubin, commissioned by Adobe Systems, and displaying a coded message in semaphore on top of the Adobe office skyscraper in downtown San Jose, CA.
- Semaphore Flag Signalling System
- Alphabet signalling system based on the waving of a pair of hand-held flags in a particular pattern.
- Wikipedia: Semaphore
- The semaphore or optical telegraph is an apparatus for conveying information by means of visual signals, with towers with pivoting blades or paddles, shutters, in a matrix, or hand-held flags.
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