Turn on, turn off the hard drive:
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Computer interface, signal read information
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Communication room, computer noise
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Franking machine
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Double click computer mouse
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Photocopy (photocopy)
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Signal, interference, Modem connection
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Input error sound, Pressing a keypad
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The USB flash drive is inserted, removed
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CD / DVD drive, disc read
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General noise, Office work
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Turning on the computer, fan noise, shutting
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Computer mouse click
★★★★★