In world war 2 computers were invented to help with aircrafts and other things. They were about the size of a whole room and now are very much faster and smaller.
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Certain powers are given to the federal government, while others are reserved for the states.
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European countries where scared that if there could be a revolution in Russia over throwing a monarchy it could happen in there country.
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Private property promotes efficiency by giving the owner of resources an incentive to maximize its value. The more valuable a resource, the more trading power it provides the owner of the resource. This is because, in a capitalist system, someone who owns property is entitled to any value associated with the property.
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