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File:Vintage Hewlett-Packard Model 41CX Alphanumeric Handheld Computer, Circa 1983 (9292728493).jpg - Wikimedia Commons
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Calculator, Hand-held, HP 41 | National Air and Space Museum
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The HP-41C: A Legend Is Born - xyHt
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HP-41C - Wikipedia
HP-41C - Wikipedia
HP Computer Museum
HEWLETT-PACKARD HP-41CV – Le Rayon des Calculatrices
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Powering up my 30 year old HP41CV programmable calculator - YouTube
