GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Computer mouse. Coloured X-ray of a computer mouse being held and operated by a human hand. A "mouse" is a computer peripheral device. Its attachment lead to a computer is seen. A set of control buttons are operated by the index and third fingers of the hand. The mouse (light blue) contains a small rubber ball (dark blue) that spins as the mouse slides over a flat surface. Electronic sensors detect the ball's movements and translate them into corresponding movements of a pointer or other icon on a computer screen. The mouse allows novices to use computer programs without having to type complex codes on a keyboard.
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