| A | B |
|---|
| Keyboard | the most frequently used input device |
| Ergonomic | designed to fit natural hand placement and reduce repetitive-motion injuries |
| Mouse | the most popular pointing device |
| Trackball | a device similar to a mouse that uses a rolling ball to control the movement of the pointer |
| Trackpad | a touch-sensitive device that you drag your finger over to control the pointer |
| Pointing stick | a small, eraser-like device embedded in the keyboard that you use as a pointer |
| Scanner | a device that transfers the content on a piece of paper into computer memory |
| Microphone | a device that is used to input sound |
| Pointer | a small arrow or other symbol on the screen |
| Scroll wheel | a wheel that can be used to scroll the page on the screen |
