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That's called a trackball. The device stays in place and you move the ball (usually) with your thumb, rather than moving a mouse which in turn moves the ball inside (or with the newer optical mouse, electronically senses the mouse motion).

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16y ago

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More answers

This is called a trackball.

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Wiki User

16y ago
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A ball mouse

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Wiki User

12y ago
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Trackball

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Wiki User

16y ago
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Q: What is a mouse with a ball on top?
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