Keyclick is a Mac OS X preference pane that provides subtle but important feedback foreach keystroke the system recognizes. Years ago keyboards were made with premium keyswitches that provided a resounding click when a key snapped over. Today most keyboardsare made using rubber domes which can provide a similar force displacement or tactilefeel, but not the sound. Human factors work on video terminals in the 1980s showed thatthe perception of keyboard crispness is correlated with audio feedback. Keyclick providesthat feedback while improving on the original.