Could be a mouse, a trackball or a touchpad.
The mousepad on the computer. Some computers have a mini mousepad between the F+G key.
-MoUsE -tRaCkBaLL -JoYsTiCk -tOuCh ScReEn -LiGht pEn -pEn-BaSeD sYstEm-DiGiTiZiNg tAbLeT -DiGiTiZiNg pEn
That's called a trackball. The device stays in place and you move the ball (usually) with your thumb, rather than moving a mouse which in turn moves the ball inside (or with the newer optical mouse, electronically senses the mouse motion).
It is called a touchpad.
If the ball is on the bottom, it's a "roller ball." If it's on the top and meant to be touched, it's a "trackball."
Most laptops already have an alternative for a mouse. Some have a mouse pad or touchpad area. Moving a finger around in the touchpad works the same as moving a mouse. Others have a pointing stick in the keyboard, usually between the G H and B keys. It works like a little joy stick. There will also be some buttons below them that work as mouse buttons. Some alternatives to a mouse include a joy stick and a trackball. A trackball is like an upside down mouse where a ball is moved around by the hand. Some laptops also have touch sensitive screens (like an ipad or android) removing the need for a separate pointing device.
You cannot change the trackpad out for a trackpad. If you want a trackball you need to get a Blackberry with a trackball such as a Tour 9630 or Curve 8330.
One can buy a Microsoft Trackball from Amazon for about $125. Some of the features include precision trackball design, five buttons and a wheel for scrolling and zooming. The Trackball is a sophisticated mouse for a laptop or a PC.
AnswerAccording to the web site www.trackballworld.com the trackball was invented in 1949 by two Canadian engineers working on a new radar system. Full reference citation: http://www.trackballworld.com/trackball-history.htmlTom Cranston and Fred Longstaff invented the trackball.
I was also having some troubles with the trackball on my blackberry and came across this article which was very helpful: http://alboett.blogspot.com/2009/12/blackberry-pearl-how-to-clean-and.html. you out.
To disable the trackball on a Dell 4310, you can typically do this through the device settings. Go to the Control Panel, select "Mouse," and look for options related to the trackball or pointing devices. You may also find a specific setting in the device manager, where you can disable the trackball driver. If these options are unavailable, you might need to check for any dedicated software provided by Dell for managing input devices.