Trackball and keyboard of Apple Powerbook computer

Trackball and keyboard of Apple Powerbook computer

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Credit: PHILLIP HAYSON/SCIENCE PHOTO LIBRARY

Caption: Computer trackball and keyboard. View of an Apple Powerbook computer, showing the trackball (mouse device) and part of the keyboard. Like the hand- operated mouse of other computers, the trackball is a more compact version used in small handheld or laptop computers. As the ball is rotated, electronic detectors pick up the ball's movements and translate them into corresponding movements of a pointer or other icon on the computer screen. The trackball makes it possible for novices to use computer programs without having to enter complex codes on the keyboard.

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Keywords: apple computer, apple macintosh, computer, computer device, computer peripheral device, hardware peripherals, high-tech, keyboard, keyboard and mouse, laptop, laptop computer, mouse, mouse/keybor, powerbook, technology, trackball

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