Chapter 3. Input Devices

This chapter describes input devices. The user interacts with the operating system through input devices such as a keyboard, a mouse, a track ball, a pen, a graphics tablet, and a joystick. This chapter focuses on standard keyboard and pointing devices, with special emphasis on the mouse.

Users employ input devices to:

1. Manipulate elements (moving a slider, or moving or copying elements)
2. Select elements (identifying or grouping elements for subsequent interaction)
3. Activate elements (choosing elements such as an action choice that initiates a subsequent action)