Turning on the computer, fan noise, shutting down:
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Computer noise, Communication room
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Turn off the old computer, Turn on
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Environmental sounds, typewriter, Office work
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Repeatedly pressing a computer mouse
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Matrix printer
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Manual copy machine
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Jet printer
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Pressing a keypad, input error sound
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Computer simulated laser
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Laser printer
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Computer mouse movement
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Photocopy (photocopy)
★★★★★