My Model 27 was bought new at the Portland State Univ. bookstore in Sept., 1976. I used it four five years of grad school, three years of univ. teaching, and a year in env. consulting before it stopped working. Symptom: neither new batteries nor the power pack would make it run. By the time I got around to contacting HP in Corvallis, OR, they had moved everything offshore. Can it be made functional? Who can or would do it? You wouldn't believe the stuff I did with it, from Newton's Approximation through Gaussian quadrature and boxcar averaging through figuring out how much car I could afford with a $100/month payment.
Model 27
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