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Chapter7_3Slides

Chapter7_3Slides - Input Output Combination Devices Input...

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1 Input Output Combination Devices Input Input is any data or instructions used by a computer. Input devices translate words, images, and actions into a form computers can process. Devices include: •Keyboards •Pointing Devices •Scanners •Image Capturing Devices •Audio-Input Devices Input Keyboards Keyboards are the most common way to input data. The most common types include: •Traditional – full sized, rigid. •Flexible – rolls up, easy packing. •Ergonomic – minimize wrist strain. •Wireless – greater flexibility. •PDA – miniature keyboard. Features include numeric keypads, toggle, and combination keys.
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2 Input Pointing Devices Accept pointing gestures and convert them to machine-readable input. •Mouse – controls a mouse pointer. A wheel button rotates to scroll through information. Three basic designs are mechanical, optical, cordless, trackball, touch surface, and pointing stick. Input Pointing Devices (cont.) •Joysticks – Are popular for computer games. Operations are controlled by varying pressure, speed, direction. •Touch Screens – Have clear plastic layer over crisscrossed invisible beams. Operations are controlled by a finger touching the screen. Input Pointing Devices (cont.) •Light Pens – Are light sensitive penlike devices. Operations are controlled by placing the light pen against the monitor. •Stylus – A penlike device used with tablet PCs, PDAs and graphic tablets. Handwriting Recognition Software translates hand-written notes.
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