It is an input device.
Neither - it just moves about the screen; it does not input information nor take it out.
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.
Ball grabber
An input for a fitness tracker could be it recording you heart rate because it is inputing that information
A tracker ball is both a the ball on top of a stationary mouse and a type of a mouse that has a ball on top. A typical mouse is moved over a pad and has the ball directing the cursor on the bottom, but a tracker ball type mouse has the ball on top of a stationary mouse where you direct the cursor by moving the ball with your thumb, FOREFINGER AND MAINLY WITH YOUR PALM. This type of mouse is sometimes called a tracker ball for short and the ball on this type of stationary mouse is also called a tracker ball. [ delete the following:...It is not a good name. What does it track? Nothing that I can tell. Computer terms were assigned by people who wanted to make it confusing, didn't speak English, or were very confused themselves] It would be better explained as follows. '''A tracker ball is both a the ball on top of a stationary mouse and''' [?a type of a mouse that has a ball on top]. '''A typical mouse is moved over a pad and has the ball directing the cursor on the bottom, but a tracker ball type mouse has the ball on top of a stationary mouse where you direct the cursor by moving the ball with your thumb,''' '''forefinger but mostly with the inner aspect of your palm. This type of mouse is used by people with arthritis or RSI as it saves making the fiddly and speedy movements with the digit joints (which cause some people pain) and directs the cursor by making a round movement after putting your hand over the large glass "tracker" which is on top of the "mouse". I myself was able to work as a secretary doing 100wpm until the age of 59 despite arthritic fingers since my late-40s, because an ERGONOMIC TRACKER MOUSE was recommended and purchased for me by my employers. I can highly recommend the TRACKER MOUSE to anybody - especially to those with arthritic hands and intermittent RSI.''' '''"Tracker Lover"'''
It's an input like we use mouse and keyboard in computer.
Trouble code P0102 means:Mass or volume circuit low input
It means that it tracks moving objects like a red missile!
A trackball is an input device for controlling the cursor (mouse) the ball works the same way the ball on a mouse works except that you use your hand to turn the ball. See: http://en.wikipedia.org/wiki/Trackball
I'm pretty sure it's an input. The computer registers the input of the rotation of the ball, than the mouse on the screen moves, that being the output.
the input devuces of a laptop are the keyboard or touchpad
A Mouse is important like Yonis and bilal hussain