http://www.reghardware.co.uk/2009/06/02/crocodile_keyboard/
“David Baker’s Crocodile Keyboard is so named because its keys are shaped like the reptile’s sharp teeth.
Baker told Register Hardware today that each triangular key has significantly more dead space around it than you’d find on a standard Qwerty layout. Consequently, users are more likely to press the correct key each time they tap.”