The document discusses various input devices for computers including keyboards, mice, joysticks, webcams, microphones, hybrid devices, audio input devices, video input devices, trackballs, light pens, and touch screens. Keyboards allow text and command input while mice control the on-screen cursor. Joysticks are used for gaming. Webcams and microphones allow audio and video input. Hybrid devices combine controls for gaming. Trackballs and touch screens provide alternate pointing methods.