Emile Baudot, Frecnh engineer, late 19th-early 20th century.
© Science Museum / Science & Society Picture Library
Engraving by A Delzers of the French engineer Emile Baudot (1848-1903), who invented the first digital telecommunication code in 1870. He also perfected the electro-mechanical hardware to send his code. This system allowed up to six operators to send mesages on the same communications line, the first practical use of multiplexing in telecommunications. Published by the International Telecommunication Union.