Franking machine:
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Bios, Sound signal of a bios computer
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Modem connection, signal, interference
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Repeatedly pressing a computer mouse
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Computer interface, signal read information
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Signals, Computer interface
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Old computer keyboard
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Photocopy (photocopy)
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Computer interface, alarm
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Manual copy machine
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Computer mouse movement
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Franking machine
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Office work, general noise
★★★★★