| A handheld input device that allows for the control of a pointer on a display screen. |
An input device controlled by rotating a ball that moves the cursor on the screen. |
| The degree of accuracy that an input device can achieve in moving the cursor. |
The study of people's efficiency in their working environment, relevant in designing input devices. |
| The responsiveness of an input device to user movements. |
A touch-sensitive surface that allows for finger movements to control the cursor. |
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Dots per inch; a measure of the sensitivity of an input device. |