Opens, closes the CD / DVD tray:
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Franking machine
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Alarm, Computer interface
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Interference, signal, Modem connection
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Office work, general noise
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Turn off the hard drive, Turn on
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Sound signal of a bios computer, bios
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Read the, Insert the disk into the drive
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Computer mouse movement
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The USB flash drive is inserted, removed
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Turn on, turn off the old computer
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Computer keyboard
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Computer simulated laser
★★★★★