Turning on the computer, fan noise, shutting down:
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Shutting, Turning on the laptop, fan noise
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Double click computer mouse
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Computer keyboard
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Turn off the old computer, Turn on
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Manual copy machine
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Computer interface, signal read information
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Jet printer
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Input error sound, Pressing a keypad
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Signals, Computer interface
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Office work, general noise
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Turning on the computer, shutting, fan noise
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Computer interface, alarm
★★★★★