How can we appreciate stored-program concept? [closed]

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To appreciate something, you need contrast with something else. How can our generation appreciate the concept of stored-program when we haven't seen any other way of computing?

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the only way out seems to me is that know how the earlier computers used to work and then compare them side by side with stored-program computers.

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Need more data to build any kind of concept. Compare in one thing, but another is the description of the concept.