Computer simulated laser:
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Pressing a keypad, input error sound
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Opens, closes the CD / DVD tray
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Laser printer
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Jet printer
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Turn off the old monitor, Turn on
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The USB flash drive is inserted, removed
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Computer interface, alarm
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Bios, Sound signal of a bios computer
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Communication room, computer noise
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Old computer keyboard
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Turning on the computer, fan noise, shutting
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Manual copy machine
★★★★★