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
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
Buckling spring
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A buckling spring is a type of keyswitch mechanism that was popularized by IBM through its keyboards for the PC, PC/AT, 5250/3270 terminals, PS/2, and other systems. It was used by IBM's Model F keybo
Model M keyboard
…International, Maxi Switch, and Unicomp. The keyboard's different variations have their own distinct characteristics, with the vast majority having a buckling-spring key design and uniform profile, swappable keycaps. Model M keyboards are notable among computer enthusiasts and frequent typists due to their durability…
IBM Model F (left) and Model M (right) keyboard springs