Matrix printer:
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Shutting, fan noise, Turning on the laptop
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Laser printer
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Repeatedly pressing a computer mouse
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Alarm, Computer interface
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Communication room, computer noise
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Input error sound, Pressing a keypad
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Computer simulated laser
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Turn on, turn off the hard drive
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Insert the disk into the drive, read the
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Signal read information, Computer interface
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Jet printer
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Franking machine
★★★★★