Computer simulated laser:
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Old computer keyboard
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Read, room noise, write, Hard disk
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Closes the CD / DVD tray, disc read, Opens
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Franking machine
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Manual copy machine
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Opening, closing the laptop cover
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Sound signal of a bios computer, bios
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Computer simulated laser
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Communication room, computer noise
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Laser printer
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Turn off the old monitor, Turn on
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Disc read, CD / DVD drive
★★★★★