trackball

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trackball

a type of computer peripheral that is larger than a typical mouse having one large ball to use to move the cursor and two large buttons for click commands.
References in periodicals archive ?
That is why Planar will (and other vendors should, as well) continue to offer keyboards, touch screens, track balls, touch pads and mice in an ergonomic line of flat panel PCs.
This phenomenon is not new, but it has been exacerbated in the past several years by the transition to computer monitors, the use of computer mouses or track balls, and the increasing complexity and volume of exams.
The NaviLite is a pin-head-sized pointing device that replaces current Track balls and Touch pads, and can be easily embedded in Laptops, handsets or other small data terminals.
It has to be a staff member, and that's why in any branch of any size you need a person roaming around just resetting terminals, returning abandoned systems to the main menus, and watching after track balls and equipment.