Office work, typewriter, environmental sounds:
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Computer simulated laser
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Manual copy machine
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Computer interface, signal read information
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Shutting, Turning on the laptop, fan noise
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Input error sound, Pressing a keypad
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Computer mouse movement
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Signal, Modem connection, interference
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Turn on, turn off the old computer
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Floppy disk reading
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Old computer keyboard
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Bios, Sound signal of a bios computer
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CD / DVD drive, disc read
★★★★★