Baudot telegraph system, illustration

Baudot telegraph system, illustration

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Credit: COLLECTION ABECASIS/SCIENCE PHOTO LIBRARY

Caption: Baudot telegraph system. 1888 illustration of an operator using a Baudot telegraph system. He is using a keyboard with five keys to enter a message to be transmitted as a series of electric pulses. The system was invented by French engineer Emile Baudot (1845-1903) in 1870, and was the first truly digital code. Incoming messages were decoded by the receiver (centre), and printed onto a length of ticker tape (spool at centre). Skilled operators could send 180 letters per minute on the Baudot system.

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