- Tracker Ball
This device is like an upside down mouse because the ball normally located on the underside of the mouse device is located on top of the tracker ball. The user rolls the ball with the finger to control the cursor movement. Sometimes we see small tracker balls on notebooks. They take up less space than a hand held mouse device but have same uses, advantages and disadvantages.
Advantages
- Some people find it much easier to select items and start tasks by clicking icons choosing from menus rather than typing commands.
- It is more often a faster method of getting to the tasks you want to start.
- It is quicker to use a mouse to help you move around a document than to use the arrows on the keyboard.
Disadvantages
- People new to computers often find it difficult to control the movement of the pointer on the computer screen by moving the mouse around the desk. They also have difficulty when double clicking the mouse button.