Modem connection, signal, interference:
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Floppy disk reading
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Computer noise, Communication room
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Computer mouse click
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Removed, The USB flash drive is inserted
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Alarm, Computer interface
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Fan noise, shutting, Turning on the laptop
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Closes the CD / DVD tray, Opens
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Write, room noise, Hard disk, read
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Double click computer mouse
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Manual copy machine
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Laser printer
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Photocopy (photocopy)
★★★★★