Explain how today's computer differ from those used during the world war

During the last world war computers were used for cracking codes, they were still working on getting machines to be Turing complete. Now says all computer languages are Turing complete and for this upcoming world war we will be attacking infrastructure as well as using them to do geometric calculations for guided missiles and other systems.
TLDR; computers were in they infancy stage back then and now we have advanced computers that a

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Answer the car to the left must yield the right of way to the vehicle on the right;