Computer keyboard:
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Photocopy (photocopy)
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Sound signal of a bios computer, bios
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Old computer keyboard
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Floppy disk reading
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Disc read, closes the CD / DVD tray, Opens
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Manual copy machine
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Signal, Modem connection, interference
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Computer mouse movement
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Jet printer
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Signal read information, Computer interface
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Turning on the computer, shutting, fan noise
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Opens, closes the CD / DVD tray
★★★★★