Hewlett-Packard HP 45 Electronic Calculator, 1973 | Science Museum Group Collection
Hewlett-Packard HP-45 Handheld Electronic Calculator | National Museum of American History
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.jpg/1280px-HP-65_Mint_in_Box_(cropped).jpg "HP-65")
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File:Vintage Hewlett-Packard Model HP-45 Advanced Scientific Pocket Calculator, HP's Third Handheld Electronic Calculator, Introduced in 1973 and Discontinued in 1976 (38772251491).jpg - Wikimedia Commons
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