Typical CAPS LOCK behavior is that pressing the key sets an input mode in which all typed letters are uppercase, if applicable. The keyboard remains in CAPS LOCK mode and would generate all caps text until the key is pressed again. Keyboards often include a small LED to indicate that CAPS LOCK is active, either on the key itself or in a dedicated indicators area, where Scroll lock and Num lock indicators are also located. On the original IBM PC keyboard, this LED was exclusively controlled by the keyboard. Since the introduction of IBM AT, however, it is under control of the operating system. Small keyboards, such as netbook keyboards, forgo the indicators to conserve space, instead providing software that gives an on-screen or audio feedback.