Computer interface, signals:
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Office work, general noise
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Turn off the old monitor, Turn on
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Floppy disk reading
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Franking machine
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Matrix printer
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Photocopy (photocopy)
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Manual copy machine
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Repeatedly pressing a computer mouse
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Computer simulated laser
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Turn off the old computer, Turn on
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Jet printer
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Bios, Sound signal of a bios computer
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