Hard disk, read, write, room noise:
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Environmental sounds, typewriter, Office work
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Closing the laptop cover, Opening
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Computer simulated laser
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Insert the disk into the drive, read the
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Turn on, turn off the old monitor
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Old computer keyboard
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Computer noise, Communication room
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Disc read, closes the CD / DVD tray, Opens
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Closes the CD / DVD tray, Opens
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Matrix printer
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Removed, The USB flash drive is inserted
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Fan noise, shutting, Turning on the computer
★★★★★