Jet printer:
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Environmental sounds, typewriter, Office work
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Matrix printer
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Double click computer mouse
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Turn off the old monitor, Turn on
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Computer interface, alarm
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Disc read, CD / DVD drive
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Laser printer
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Repeatedly pressing a computer mouse
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Input error sound, Pressing a keypad
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Read, write, room noise, Hard disk
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Floppy disk reading
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Computer interface, signal read information
★★★★★