HP 15C Collector's Edition Review
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HP 42S Scientific Calculator from 1988
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Excitedly unboxing my new HP 15c Collector's Edition calculator and checking the keyboard
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HP 48SX Calculator from 1990
21:27
Unboxing a new HP15C Collector's Edition Calculator
1:41:26
DB48X - Reviving the spirit of HP calculators
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Kahan on HP calculators: Solve, Integrate and Matrix Operations
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HP 12C Financial Calculator versions - Which is best?
25:15