IBM PC Keyboard
The keyboards for IBM PC compatible computers are standardized. However, during the 3-plus decades of PC architecture being constantly updated, multiple types of keyboard layout variations have been developed.
A well-known class of IBM PC keyboards is the Model M. Introduced in 1985 and manufactured by IBM, Lexmark and Unicomp, the vast majority of Model M keyboards feature a buckling spring key design and many have fully swappable keycaps.
Read more about IBM PC Keyboard: Keyboard Layouts, Standard Key Meanings, Connection