Opening, closing the laptop cover:
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Jet printer
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Input error sound, Pressing a keypad
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Computer simulated laser
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Bios, Sound signal of a bios computer
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CD / DVD drive, disc read
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Photocopy (photocopy)
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Computer interface, alarm
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Repeatedly pressing a computer mouse
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Signal read information, Computer interface
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Turn on, turn off the old monitor
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Opening, closing the laptop cover
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Shutting, Turning on the laptop, fan noise
★★★★★