Break key
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The Break key of a computer keyboard refers to breaking a telegraph circuit and originated with 19th century practice. In modern usage, the key has no well-defined purpose and can be used by software
Break key on Teletype Model 33
Model M keyboard
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Model M keyboards are a group of computer keyboards designed and manufactured by IBM starting in 1985, and later by Lexmark International, Maxi Switch, and Unicomp. The keyboard's different variations
Break key
…or to interrupt a modem connection. Because the break function is usually combined with the pause function on one key since the introduction of the IBM Model M 101-key keyboard in 1985, the Break key is also called the Pause key. It can be used to pause some computer games. A standard telegraph circuit connects…
An IBM Model M manufactured in the early 1990s
Unicomp Model M with removed "z" key. The buckling spring is visible.
Keycap in a French Model M
IBM Model M2, Part no. 1395713, manufactured 1992