Insert the disk into the drive, read the disk, take it out:
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Photocopy (photocopy)
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Opens, closes the CD / DVD tray
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Alarm, Computer interface
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Matrix printer
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Opens, closes the CD / DVD tray, disc read
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Laser printer
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Room noise, Hard disk, write, read
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Repeatedly pressing a computer mouse
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Double click computer mouse
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Shutting, fan noise, Turning on the laptop
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Shutting, Turning on the computer, fan noise
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Signals, Computer interface
★★★★★