My HP-11C. Given to me by my roommate in 1985 when he couldn't pay the phone bill. : r/calculators
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Hewlett-Packard HP 11C Handheld Electronic Calculator | National Museum of American History
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HP-11C Scientific Programmable Calculator - complete with - Catawiki
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Eddie's Math and Calculator Blog: Retro Review: Hewlett Packard HP 11C
HP 11C Scientific Calculator
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Hewlett-Packard HP 11C Handheld Electronic Calculator | National Museum of American History
A look inside Hewlett-Packard's HP-11C
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HP 11C Programmable Calculator | Educalc.net
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Hewlett-Packard Voyager series - Wikipedia
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