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16-Jan-2020 11:36

As early as the 1870s, teleprinter-like devices were used to simultaneously type and transmit stock market text data from the keyboard across telegraph lines to stock ticker machines to be immediately copied and displayed onto ticker tape.

The teleprinter, in its more contemporary form, was developed from 1907 to 1910 by American mechanical engineer Charles Krum and his son Howard, with early contributions by electrical engineer Frank Pearne.

The internationally common 102/104 key keyboards have a smaller left shift key and an additional key with some more symbols between that and the letter to its right (usually Z or Y). Computer keyboards are similar to electric-typewriter keyboards but contain additional keys, such as the command or Windows keys.

There is no standard computer keyboard, although many manufacturers imitate the keyboard of PCs.

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It was through such devices that modern computer keyboards inherited their layouts.

Following the decline of punch cards and paper tape, interaction via teleprinter-style keyboards became the main input device for computers.



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