Turn on, turn off the hard drive:
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Matrix printer
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Pressing a keypad, input error sound
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Interference, Modem connection, signal
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Turn on, turn off the hard drive
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Disc read, closes the CD / DVD tray, Opens
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Computer keyboard
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Computer simulated laser
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Old computer keyboard
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Shutting, fan noise, Turning on the laptop
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Office work, general noise
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Laser printer
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Photocopy (photocopy)
★★★★★