Editing IBM 122-key terminal keyboards (section)

==Design Details==

The 122 key layout is identical to that of the earlier Model F 122. Compared to a 101 key layout, it has a standard ISO alpha block, 10 additional function keys to the left of the alpha block, no Esc key, 12 additional function keys on top, a cross navigation block, and a split Numpad +. The physical layout of the M122 has remained the same throughout its life, although the functions assigned to each key vary depending on the terminal’s usage. For example, the 24 function keys can be labeled F1-24, PF1-24, or Cmd1-24 depending on the model.

Although the vast majority of M122s use IBM's Membrane Buckling Spring technology, some later M122s were made with rubber dome over membrane switches.