My grandpa's 1965(ish) HP 21 Calculator : r/BuyItForLife

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

Vintage HP-12C financial calculators from the 1980s are indestructible : r/ BuyItForLife

Calculators - Office of NIH History and Stetten Museum

HP 65 –

Vintage Hewlett-Packard Calculator Literature

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

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

Drake finally got his old high school rhyme book back. So I'm uploading the available pages. Also has some rare photos. : r/Drizzy

Innovera 15921 Pocket Calculator with Hard Shell Flip Cover, 8-Digit LCD