Opening, closing the laptop cover:
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Fan noise, shutting, Turning on the computer
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Computer simulated laser
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Sound signal of a bios computer, bios
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Pressing a keypad, input error sound
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Computer noise, Communication room
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Manual copy machine
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Computer interface, signal read information
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Room noise, Hard disk, read, write
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Alarm, Computer interface
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Insert the disk into the drive, read the
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Jet printer
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Computer mouse movement
★★★★★