It can sometimes help you to do things in the computer
According to the Amazon website, there are many trackballs with high ratings. Some brand names with the best ratings include Logitech, Microsoft, and Kensington.
Track pads , Trackballs and Pointer
Trackball to my understanding is the ball under the manual Mice which is use to move the pointer.
Printers, scanners, external drives, mouse, trackballs, keyboards, etc.
Trackballs don't have capacity. They are not a storage medium. Did you intend to ask something else?
Pointing device (device class including trackpoints and trackballs).
The variants of computer mouse are: Track pads Trackballs and pointer Integrated Pointing Device
Trackballs are more expensive than traditional mice because they are far less popular. They are a niche market which are often use them their entire lives.
Trackballs are really upside-down, roller-bearing mice. Instead of the ball being inside the body, the ball is on the outside of a trackball and you move just the ball instead of the mouse body. Trackballs have several advantages over mice. Because you don't actually move the trackball itself, it takes up less space than a mouse does. And you don't have to lift it up to move it when you run out of room or reach. Because your hand remains stationary, you don't rub the sensitive areas of your wrist across the edge of your desk, which can lead to damage of the tissues in your forearm. Trackballs also have more than one button, and you can program the other buttons to perform various functions. For example, you can set a button to add a modifier key to the click so that you can bring up contextual menus with a click instead of having to hold down the Control key while you click. And trackballs can move the cursor either faster to cover more screen real estate or more slowly to give you more precise control than a mouse. Choosing a trackball is similar to choosing a keyboard or mouse (except that Macs don't ship with a "default" trackball). Look for one that fits your hand and has the features you want?such as the number of buttons it has.
Advantages of using a trackball include reduced strain on the wrist and arm, as users can keep their hand stationary while manipulating the ball, making it suitable for limited desk space. They can also offer precision in control, beneficial for tasks requiring fine movements. However, disadvantages include a learning curve for new users and potential build-up of dirt and debris in the mechanism, which can affect performance. Additionally, trackballs may not be as widely accepted in standard workflows, leading to compatibility issues with certain software or tasks.
That depends on how rough you may be with one. I have seen Blackberry cell phones with broken cases, broken screen covers, missing trackballs and/or keys, etc.
Computer mouse or a pointing device. Is that what you mean?