| 1. | The typical pointing device is a track ball, which operates as follows.
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| 2. | But after this last drop, the track ball light does not work.
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| 3. | A sticky track ball made it difficult to maneuver the computer screen's pointer.
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| 4. | Track balls, which are essentially upside-down mice, seem to be growing in popularity.
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| 5. | But this sensing technology will go way beyond replacing the track ball and mouse.
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| 6. | But they disagree on whether clickable mice or track balls are easier on the body.
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| 7. | But it will be easier to use a mouse than a track ball under such circumstances.
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| 8. | A common complaint about the arcade cabinet was that the track ball controls frequently broke from repeated use.
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| 9. | Atari assumed the track balls accounted for the poor reception and commissioned a second model with joystick controls.
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| 10. | Laptops come with three basic types of pointing devices : a track ball, a mini-joystick or a touch pad.
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