WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Computer mouse and keyboard. Hand operates a computer mouse beside a computer keyboard. The mouse contains a small rubber ball that spins as the mouse slides over a flat surface. Electronic detectors pick up the ball's movements and translate them into corresponding movements of a pointer or other icon on a computer screen. The mouse makes it possible for novices to use computer programs without having to enter complex codes on the keyboard.
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