tits on a keyboard

tits on a keyboard
 n.

   Small bumps on certain keycaps to keep touch-typists registered.
   Usually on the 5 of a numeric keypad, and on the F and J of a {QWERTY}
   keyboard; but older Macs (like pre-PC electric typewriters) had them
   on the D and K keys (this changed in 1999).
    

tits on a keyboard

   <jargon> Small bumps on certain keycaps to help touch-typists
   find the home keys (ASDF and JKL;) without looking.  They are
   nearly always on the "F" and "J" of a {QWERTY} and the "5" of
   a numeric keypad.  The {Macintosh}, perverse as usual, has
   them on the "D" and "K" keys.

   This term is based on the vernacular American expression "as
   useful as tits on a boar" (or boar-hog, bull, bullfrog, or
   many other variants), meaning "not useful".

   [{Jargon File}]

   (1998-02-25)