My grandpa's 1965(ish) HP 21 Calculator : r/BuyItForLife
![My grandpa's 1965(ish) HP 21 Calculator : r/BuyItForLife](https://i.redd.it/vyhftmdgg1ab1.jpg)
![](https://pbs.twimg.com/media/E0PEDBGWEAA1ZHJ.jpg)
Pulp Librarian on X: Pocket tech took a big step forward in the 1970s via the humble calculator, and one model in particular: the 1974 Hewlett Packard HP-65. It was the world's
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Vintage HP-12C financial calculators from the 1980s are indestructible : r/ BuyItForLife
![](https://history.nih.gov/download/attachments/7536743/060007001.jpg?version=1&modificationDate=1585589140907&api=v2)
Calculators - Office of NIH History and Stetten Museum
![](https://vintage-calculator.com/wp-content/uploads/2011/10/hp-11c.jpg)
HP 65 –
![](http://www.pahhc.org/2007/HHC2007/HP_brochures/hp67.jpg)
Vintage Hewlett-Packard Calculator Literature
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I found the non-electronic calculator my grandpa used to use. Still works, and even has a stylus that is on the right side! : r/mildlyinteresting
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My grandpa gave me this old calculator (HP-12C). I do not know anything about it or if it is anything special but I saw the hp logo. Can anybody tell me about
![](https://i.redd.it/drake-finally-got-his-old-high-school-rhyme-book-back-so-im-v0-xym9m242gheb1.jpg?width=828&format=pjpg&auto=webp&s=bcd620dfa00c53671b22affbb671bfa7604a2b0c)
Drake finally got his old high school rhyme book back. So I'm uploading the available pages. Also has some rare photos. : r/Drizzy
![](https://i5.walmartimages.com/asr/dd0fae77-a1a7-4b24-8490-3b1fe5986038_1.0ff218aa5ee74c6c6463e40f48efd57b.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
Innovera 15921 Pocket Calculator with Hard Shell Flip Cover, 8-Digit LCD