An upside-down mouse that remains stationary on a portable computer. When you roll the trackball with your fingers or palm, the mouse pointer on the screen moves in the same direction. A trackball is an alternative to a mouse.
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An upside-down mouse that remains stationary on a portable computer. When you roll the trackball with your fingers or palm, the mouse pointer on the screen moves in the same direction. A trackball is an alternative to a mouse. | |
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