My grandpa's 1965(ish) HP 21 Calculator : r/BuyItForLife
4.9 (299) · € 24.50 · En Stock
My HP calculators : r/calculators
HP-21
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
File:Vintage Hewlett-Packard Model 21 Electronic Pocket Calculator, Made in the U.S.A., A Scaled-Down HP 25, Circa 1975 (11574422413).jpg - Wikimedia Commons
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
My HP calculators : r/calculators
HP-65 - Wikipedia
My friend found an old graphing calculator and wants to find the manual online but there's no branding, can anyone identify the calculator based on these images? : r/calculators
Vintage Hewlett-Packard Calculator Literature
44_Longévité & rencontre avec Pierre Déom, créateur de la Hulotte, partie 2
)
