an electronic device consisting of a rotatable ball in a housing; used to position the cursor and move images on a computer screen
"a trackball is essentially an upside-down mouse"
A pointing device consisting of a ball housed in a socket
A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a 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 pointer. Compared with a mouse, a trackball has no limits on effective travel; at times, a mouse can reach an edge of its working area while the operator still wishes to move the screen pointer farther. With a trackball, the operator just continues rolling Some trackballs, such as Logitech's optical-pickoff types, have notably low friction, as well as being dense, so they can be spun to make them coast.The trackball's buttons may be situated to that of a mouse or to a unique style that suits the user. Large trackballs 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. The trackball was invented by Tom Cranston and Fred Longstaff as part of the Royal Canadian Navy's DATAR system in 1952, eleven years before the mouse was invented. This first trackball used a Canadian five-pin bowling ball.
The numerical value of trackball in Chaldean Numerology is: 3
The numerical value of trackball in Pythagorean Numerology is: 8
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