trackball

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trackball

[′trak‚bȯl]
(computer science)
A ball inset in the console of a video display terminal, which can be rotated by the operator, and whose motion is followed by a cursor on the display screen.

trackball

A stationary pointing device that contains a movable ball rotated with the fingers or palm. From one to four keys are located in various positions depending on the unit. In the late 1980s and 1990s, Kensington Microware popularized the trackball with its Turbo Mouse for the Macintosh. Turbo Mouse for Windows was subsequently released, and over the years, the Turbo Mouse evolved into the Expert Mouse and Orbit brands.

The advantage of the trackball, and the reason many people like it, is that the unit remains in the same position on the desk, and only the ball is moved. See mouse, pointing stick and touchpad.


The Turbo Mouse
The Turbo Mouse popularized the trackball for the Macintosh. Later models were developed for the PC. (Image courtesy of Kensington Microware, Ltd.)
References in periodicals archive ?
Participants ranked the roller ball tip as the preferred cane tip for use on a snow-covered surface (M = 1.9, SD = 1.0), which was followed by the marshmallow roller tip (M = 2.2, SD = .8), the bundu basher tip (M = 2.5, SD = 1.0), and the metal glide tip (M = 3.4, SD = 1.2).
The prices start at Dh5,950 for the roller ball version.
A total of 1910 pens were crafted: 246 (representing 24th June 1910, the date on which the Anonima Lombarda Fabbrica Automobili was founded) celluloid and carbon fibre fountain, ballpoint and roller ball pens; another 246 of each made of celluloid and silver and another 167 of each of the respective mechanical pencils and 25 each of the four series in celluloid and solid 18k gold.
It comes in this tube with a roller ball on the end that is really cold, so when you apply it under the eye the coolness is very soothing.
Other models have used a roller ball in the same position as the optical trackpad, which is located in the center of the device, just below the display and just above the physical keyboard.<p>Wireless carrier T-Mobile and Research in Motion Ltd., the maker of the BlackBerry, emphasized the ease of connecting to e-mail, messaging and social networks sites with the new 8520, as well as the physical keyboard, which is seen as important by some customers who have not adapted well to a touchscreen keyboard, which is used in Apple iPhone or the BlackBerry Storm.
After visiting a scuba shop in the early 1970s, he even conceived and built a rocket backpack that his son, Curt, demonstrated in the guise of "Captain Roller Ball" at various racetracks and on The Mike Douglas Show.
The range aims to bring out the glamour in every girl and products include sparkle eye palette, pounds 18, in bronzes, golds and greens, sparkle roller ball, pounds 7, which has a hint of glitter for cheeks and lips and sparkle eye liner in golden sun, pounds 10.
Easy to use in a roller ball applicator, they come in six colours and are formulated with ultra-fine mica crystals to glide on to the eyelid, giving a "second skin" effect.
Barbara Daly Mineral Eye Shimmer in Spring (pounds 5) Plenty of shimmer in a spring colour but the roller ball applicator is not comfortable on the thin skin of the eyelid.
Colorful plastic rings and a roller ball help develop fine motor skills.
By early last year, the organization had responded with the creation of the "Jhai computer"--a 486-comparable unit with keyboard, roller ball and LCD screen, connected to a dot-matrix printer, all of which require a total of less than 20W.
While small numbers of fountain pens continue to be sold as nostalgic and specialty writing items, some five billion ballpoint pens, most bearing a tiny tungsten-carbide roller ball, are manufactured annually.