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HP-11c. Mine is probably new in 1985ish. I think on its 4th set of batteries. I'd love an HP-15c for the additional program memory, but collectors have drive
by slowhand09 5y ago
HP-11c. Mine is probably new in 1985ish. I think on its 4th set of batteries. I'd love an HP-15c for the additional program memory, but collectors have driven the prices crazy. RPN is super-efficient.