Today, a look at the unfinished paper clip. The University of Houston's College of Engineering presents this series about the machines that make our civilization run, and the people whose ingenuity created them. Some years ago, I sent a paper off to an editor. I happened to put it together with a paper clip I'd carried back from Jugoslavia. He was delighted. He collected paper clips. This was one he hadn't seen. After that, I found a different clip for everything I sent him. I never ran out of variations.
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