IBM PC keyboard

Keyboards for the IBM PC are standardized. However during the 20 years of the PC architecture being constantly updated as well several types of keyboards have been developed. They all utilise the QWERTY layout.

83-Key PC/XT Keyboard Layout
84-Key AT Keyboard Layout
101-Key "Enhanced" Keyboard Layout - additional navigation and control keys
102-Key "Enhanced" Keyboard Layouts - additional key to the left to the key)
104-Key "Windows" Keyboard Layout - Windows and menu key added
107-Key "Enhanced" Keyboard Layout - Wake, Sleep, and Power keys added (for power management)

There are three types of connectors used to connect the keyboards the main unit The first two are:

5-pin DIN (DIN 41524, "AT") connector
6-pin "mini-DIN" (DIN 45322, "PS/2") connector.

They are physically different but electrically the same.

The third is via a USB connector.

External Link

Standard keyboard layouts