Keyboard layout
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A keyboard layout is any specific physical, visual, or functional arrangement of the keys, legends, or key-meaning associations (respectively) of a computer keyboard, mobile phone, or other computer-controlled typographic keyboard.
MIT "space-cadet" keyboard, a pre-ISO/IEC 9995 keyboard with a large number of modifier keys. It was equipped with four keys for bucky bits (Control, Meta, Hyper, and Super); and three shift keys, called "shift", "top", and "front".
4800-52 mainframe / dumb terminal keyboard, c. mid-1980s. There is an obscure configuration of modifier and arrow keys, line feed key, break key, blank keys, and repeat key.
Keyboard of a Letter-Printing Telegraph Set built by Siemens and Halske in Russia c. 1900
A visual layout consisting of both factory-printed symbols and customized stickers
Typewriter
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A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against the paper with a type element. At the end of the nineteenth century, the term 'typewriter' was also applied to a person who used such a device.
Mechanical desktop typewriters, such as this Underwood Typewriter, were long-time standards in government agencies, newsrooms, and offices.
Peter Mitterhofer's typewriter prototype (1864)
The 1969 Olivetti Valentine typewriter, featured in the permanent collections of the Metropolitan Museum of Art, Museum of Modern Art, and Cooper Hewitt, Smithsonian Design Museum in New York; London's Design Museum and Victoria and Albert Museum.
An Elliott-Fisher book typewriter on display at the Historic Archive and Museum of Mining in Pachuca, Mexico