Turn on, turn off the hard drive:
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The USB flash drive is inserted, removed
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Opens, closes the CD / DVD tray
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Alarm, Computer interface
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Office work, general noise
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Turn on, turn off the hard drive
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Communication room, computer noise
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Disc read, CD / DVD drive
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Turning on the computer, fan noise, shutting
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Repeatedly pressing a computer mouse
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Signals, Computer interface
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Computer keyboard
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Closing the laptop cover, Opening
★★★★★