Opens, closes the CD / DVD tray:
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Typewriter, Office work, environmental sounds
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Floppy disk reading
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Pressing a keypad, input error sound
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Sound signal of a bios computer, bios
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Matrix printer
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Laser printer
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Turn off the old monitor, Turn on
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Disc read, Opens, closes the CD / DVD tray
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Opening, closing the laptop cover
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Old computer keyboard
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Fan noise, Turning on the laptop, shutting
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Computer interface, signal read information
★★★★★