Caps lock is a key on many computer keyboards. Pressing it sets an input mode in which typed letters are uppercase by default (i.e. in All caps). The keyboard remains in caps lock mode until the key is pressed again. On some computers, holding down the shift key while caps lock is on temporarily switches to lowercase. User interfaces Keyboards often include a small LED to indicate that caps lock is active—either on the key itself, or in a row with scroll lock and num lock indicators. However, some new laptop and wireless desktop keyboards lack the LED, instead providing software that...