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Telegraph was an important means of communication from the mid-1800's to the mid-1900's. The telegraph was the first instrument used to send messages by means of wires and electric current. Telegraph operators sent signals using a device that interrupted the flow of electric current along a wire. They used shorter and longer bursts of current, with spaces in between, to represent the letters of the message in what became known as Morse code. A device at the receiving end converted the signals… More »
Broadband communication is a term that refers to the high-speed transmission of data. This... More >>
Fax machine is an electronic device that sends and receives written words and pictures over... More >>
Morse code is a system of sending messages that uses short and long sounds combined in various... More >>
Overland telegraph runs across Australia for about 2,200 miles (3,540 kilometers) from Adelaide... More >>
Teletypesetter (TTS) was a device used to transmit and typeset reports from news wire services.... More >>
Teletypewriter was an electromechanical typewriter that transmitted impulses over a wire to a... More >>
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