Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Electrical_telegraph> ?p ?o }
- Electrical_telegraph abstract "An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via dedicated telecommunication lines or radio. The electromagnetic telegraph is a device for human-to-human transmission of coded messages.The electrical telegraph, or more commonly just telegraph, superseded optical semaphore telegraph systems, such as Claude Chappe's cables designed for communication among the French military, and Friedrich Clemens Gerke for the Prussian military, thus becoming the first form of electrical telecommunications. In a matter of decades after their creation, electrical telegraph networks permitted people and commerce to transmit messages across both continents and oceans almost instantly, with widespread social and economic impacts.".
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