(plural is mice) is a device originally designed to contour the human hand,
though modern mice come in all shapes and sizes. The mouse is one of the most important
navigational tools for a computer.
The mouse was designed with a ball and set of sensors that track the movement of the ball forward to backward and left to right. While many mice have retained this element, some newer mice utilize other tracking methods such as optical sensors.
The original name came from the fact, with it's cord, the mouse resembles the rodent. Now some mice are wireless and lack this tail.
The position of the mouse is represented by an arrow on your screen.