The NS-4 were the earlier model of advanced humanoid droids before the release of the NS-5's, produced by United States Robotics (USR for short). As with all USR Robots, they were "3 Laws Safe", meaning they adhered to the Three Laws of Robotics, which were hard wired in the integral system of each machine. They were customized randomly with different colors throughout the years as owners decided individually how they wished their personal robots to appear. When the new NS-5 model was brought ou
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