Hard disk, read, write, room noise:
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Removed, The USB flash drive is inserted
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Computer keyboard
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Floppy disk reading
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Bios, Sound signal of a bios computer
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Signal read information, Computer interface
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Shutting, fan noise, Turning on the computer
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Repeatedly pressing a computer mouse
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Jet printer
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Laser printer
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Signals, Computer interface
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Photocopy (photocopy)
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Disc read, Opens, closes the CD / DVD tray
★★★★★