The Five Major Input Devices Used On A Computer Include The Keyboard, Mouse, Trackball, Touchscreen, And Joystick. The Keyboard Is The Most Common Type Of Input Device. It Is Used To Enter Text And Control Applications And Operating Systems. The Mouse Is Used To Click On Items On The Screen, Move The Cursor Around The Screen, And Interact With Menus And Buttons. Trackballs Are Similar To Mice. They Are Used To Click On Items On The Screen And Move The Cursor Around The Screen. Touchscreens Are Small Screens That Can Detect The Presence And Location Of A Finger, Stylus, Or Other Object. They Are Commonly Used To Interact With Menus And Buttons And To Control Some Software. Joysticks Are Used To Control Games And Other Software.