Opens, closes the CD / DVD tray:
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Franking machine
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Matrix printer
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Computer simulated laser
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Closes the CD / DVD tray, Opens
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Disc read, CD / DVD drive
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Computer keyboard
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Typewriter, Office work, environmental sounds
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Write, read, Hard disk, room noise
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Alarm, Computer interface
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Photocopy (photocopy)
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Disc read, closes the CD / DVD tray, Opens
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Repeatedly pressing a computer mouse
★★★★★