Telegraph

Telegraph:-

             The telegraph was perfected by Samuel Morse, a painter. With the words “What hath God wrought,” transmitted by Morse’s electric telegraph between Washington, D.C., and Baltimore, Maryland, in 1844, a completely revolutionary means of real-time, long-distance communications was triggered. The telegraph, ideally suited for manual keying, is the forerunner of digital communications. Specifically, the Morse code is a variable-length code using an alphabet of four symbols: a dot, a dash, a letter space, and a word space; short sequences represent frequent letters, whereas long sequences represent infrequent letters.