Turning on the computer, fan noise, shutting down:
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Turning on the laptop, shutting, fan noise
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Sound signal of a bios computer, bios
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Turn on, turn off the old computer
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Turning on the computer, fan noise, shutting
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Old computer keyboard
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Turn on, turn off the old monitor
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Laser printer
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Manual copy machine
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Interference, signal, Modem connection
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Hard disk, write, room noise, read
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Closing the laptop cover, Opening
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Floppy disk reading
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