trackball mouse!

trackball mouse

Comprehensive Analysis

1) "Trackball" -- As to trackball mouse track·ball Pronunciation: 'trak-"bol Function: noun : a ball that is mounted usually in a computer console so as to be only partially exposed and that is rotated to control the movement of a cursor on a display Pronunciation Symbols Logitech TrackMan A trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes—like an upside-down mouse with an exposed protruding ball. The user rolls the ball with the thumb, fingers, or the palm of the hand to move a cursor. Large tracker balls are common on CAD workstations for easy precision. Before the advent of the touchpad, small trackballs were common on portable computers, where there may be no desk space on which to run a mouse. Some small thumbballs clip onto the side of the keyboard and have integral buttons with the same function as mouse buttons. When mice and trackballs still had chopper wheels, trackballs had the advantage of being in contact with the user's hand, which is generally cleaner than the desk or mousepad and doesn't drag lint into the chopper wheels. The late 1990s advent of scroll wheels, and the replacement of mouseballs by direct optical tracking, put trackballs at a disadvantage and forced them to retreat into niches where their distinctive merits remained important. Most trackballs now have direct optical tracking which follows dots on the ball. Some mice, in place of a scroll wheel, acquired a small trackball between the ears, useful in maps, badly laid out Web pages, and other circumstances calling for scrolling in two dimensions. 1 Special applications 2 Ergonomics 3 References 4 Notes 5 External links Large tracker balls are sometimes seen on computerised special-purpose workstations, such as the radar consoles in an air-traffic control room or sonar equipment on a ship or submarine. Modern installations of such equipment may use mice instead, since most people now already know how to use one. However, military mobile anti-aircraft radars and submarine sonars tend to continue using trackballs, since they can be made much more durable, more fit for fast emergency use and, in th..." 2) "Mouse" -- As to trackball mouse 1mouse Pronunciation: 'maus Function: noun Inflected Form(s): plural mice /'mIs/ Etymology: Middle English, from Old English mus; akin to Old High German mus mouse, Latin mus, Greek mys mouse, muscle 1 : any of numerous small rodents (as of the genus Mus) with pointed snout, rather small ears, elongated body, and slender tail 2 : a timid person 3 : a dark-colored swelling caused by a blow; specifically : BLACK EYE 4 plural also mous·es : a small mobile manual device that controls movement of the cursor and selection of functions on a computer display Pronunciation Symbols Mouse Fossil range: Late Miocene - Recent Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Rodentia Superfamily: Muroidea Family: Muridae Subfamily: Murinae Genus: Mus Linnaeus, 1758 Feral mouse A mouse (plural mice) is a rodent that belongs to one of numerous species of small mammals. The best known mouse species is the common house mouse (Mus musculus). It is found in nearly all countries and, as the laboratory mouse, serves as an important model organism in biology; it is also a popular pet. The American white-footed mouse (Peromyscus leucopus) and the deer mouse (Peromyscus maniculatus) also sometimes live in houses. These species of mice live commensally with humans. Although they may live up to two years in the lab, the average mouse in the wild lives only about 3 months, primarily due to heavy predation. Cats, wild dogs, foxes, birds of prey, snakes and even certain kinds of insects h..." 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