Computer mouse movement:
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Signal, Modem connection, interference
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Computer simulated laser
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Photocopy (photocopy)
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Double click computer mouse
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Floppy disk reading
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Computer noise, Communication room
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Disc read, CD / DVD drive
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Turn on, turn off the old computer
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Franking machine
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Matrix printer
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Turning on the computer, shutting, fan noise
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Laser printer
★★★★★