Computer interface, signal read information:
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Input error sound, Pressing a keypad
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Floppy disk reading
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Computer keyboard
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Repeatedly pressing a computer mouse
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Matrix printer
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Photocopy (photocopy)
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Turning on the laptop, fan noise, shutting
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Insert the disk into the drive, read the
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Laser printer
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Read, Hard disk, room noise, write
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Removed, The USB flash drive is inserted
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Opens, closes the CD / DVD tray
★★★★★