The Secret of the RAS system

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It is not my purpose to describe the RAS system in detail. I will only give one fact about this system, which is mentioned by the authors of "The Answer: "Your RAS has a built-in GPS system. With a GPS, you don't need to know where all the roads are located in a given city. You only need to decide where you want to go. You input the data and the GPS directs you.