Tracker Ball: A Trackerball is an Input Device.
A tracker ball is a pointing device; it is a mouse lying on its back. To move the pointer, you rotate the ball with your thumb, your fingers, or the palm of your hand. There are usually one to three buttons next to the ball, which you use just like mouse buttons.
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A tracker ball is an input device where a finger is used to rotate a ball. This moves a pointer on the screen. (It is very like an upside-down mouse!)
In computing, a track ball is a pointing device, such as the one seen at the bottom of a computer mouse. They work by using sensors to detect the direction in which the user is moving it.
One can download an IP address tracker on various websites like CNET and ZDNet. Both websites provide all kinds of downloads including an IP address tracker.
The advantage of the E-ball computer technology is that it is portable and it has a large memory. The disadvantage is that the cost of the E-ball is very high and the normal operating systems cannot work in these computers.
A BitTorrent tracker is a server that assists in the communication between peers using the BitTorrent protocol. It is also, in the absence of extensions to the original protocol, the only major critical point, as clients are required to communicate with the tracker to initiate downloads. Clients that have already begun downloading also communicate with the tracker periodically to negotiate with newer peers and provide statistics; however, after the initial reception of peer data, peer communication can continue without a tracker.- Wikipedia (http://en.wikipedia.org/wiki/BitTorrent_tracker)
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