Pressing a keypad, input error sound:
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Laser printer
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Sound signal of a bios computer, bios
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Turn on, turn off the old computer
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Floppy disk reading
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Computer mouse movement
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Shutting, fan noise, Turning on the laptop
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Computer mouse click
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Opens, closes the CD / DVD tray, disc read
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Computer interface, alarm
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Matrix printer
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Computer simulated laser
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Signal read information, Computer interface
★★★★★