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Input and Output Devices, Keyboards and Keypads kbd, Advantage, Image…
Input and Output Devices
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Output Devices
Laser printer
Advantage
May be expensive, but cheaper for long run
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Ink-jet printer
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disadvantage
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use water-soluble ink, so if the ink is print out wet, the ink will run
Keyboards and Keypads
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Advantage
By showing live content with zoom and focus features, document cameras can keep students or participants engaged
A document camera allows users to project physical documents, objects, or live demonstrations onto a screen in real-time
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Image quality issue
Disadvantage
someteimes, the quality of camera is bad
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