The most common input devices include
The most common input devices include Mouse and keyboard.
A mouse is used to move a little cursor around the screen, clicking and dragging as you go. if you let go of the mouse, the cursor will stop. The computer is relying on you to move the mouse, the mouse won't move on its own! Therefore it is an input device.
An input device can send data to another device, but it cannot receive data from another device. ... Keyboard and Mouse - Accepts input from a user and sends that data (input) to the computer. They cannot accept or reproduce information (output) from the computer.
The graphical user interfaces (GUIs) in use today require some kind of device for positioning the on-screen cursor. Typical pointing devices are: mouse, trackball, touch pad, trackpoint, graphics tablet, joystick, and touch screen.