Computer interface, signals:
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Typewriter, Office work, environmental sounds
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Fan noise, Turning on the laptop, shutting
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Franking machine
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Old computer keyboard
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Signal read information, Computer interface
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Computer interface, signals
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Computer interface, alarm
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Bios, Sound signal of a bios computer
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Photocopy (photocopy)
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Computer keyboard
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Matrix printer
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Signal, interference, Modem connection
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