Franking machine:
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Computer noise, Communication room
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Turning on the laptop, shutting, fan noise
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Franking machine
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Photocopy (photocopy)
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Double click computer mouse
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Jet printer
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Write, room noise, read, Hard disk
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Alarm, Computer interface
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Input error sound, Pressing a keypad
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Computer interface, signal read information
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Manual copy machine
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Repeatedly pressing a computer mouse
★★★★★