Mice and trackballs are input devices commonly used with computers to control the cursor on the screen. A mouse is a small handheld device that typically has two or more buttons and a scroll wheel. It is designed to be moved across a flat surface, such as a desk, and the cursor on the screen moves in the same direction as the mouse. The buttons on the mouse are used to perform various actions, such as selecting and dragging items, while the scroll wheel allows for easy navigation through documents or web pages. Mice are available in wired and wireless versions, with the latter offering more flexibility in movement. On the other hand, a trackball is a stationary device that consists of a ball on the top, which can be rotated with the fingers or palm. The cursor on the screen moves according to the direction and speed of the ball's rotation. Trackballs are often preferred by individuals who require precise control, as they allow for more accurate movements compared to mice. They are also beneficial for those with limited desk space, as they do not require much surface area to operate. Both mice and trackballs offer ergonomic designs to ensure comfort during prolonged use. They are compatible with various operating systems and can be easily connected to computers via USB or wireless technology. These input devices have become essential tools for navigating through digital interfaces, playing games, and performing tasks efficiently.