Opening, closing the laptop cover:
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Computer interface, signals
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Sound signal of a bios computer, bios
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Computer interface, alarm
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Signal read information, Computer interface
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Computer simulated laser
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Jet printer
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Office work, environmental sounds, typewriter
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The USB flash drive is inserted, removed
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Modem connection, signal, interference
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Computer noise, Communication room
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Repeatedly pressing a computer mouse
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Insert the disk into the drive, read the
★★★★★