Casio FX82 calculator I bought in 1982 at the age of 15. Used it throughout school, my apprenticeship and work as a draughtsman. Don't use it much now but it still works
calculators\Casio fx-82ES - calculator.org
Casio fx-82
Virtual Museum of Calculators
Casio Fx-82 ES Plus Calculator Natural-V.A.P.M | eBay
You May Not Know: 20 Cool Features Of Casio fx-82MS Scientific Calculator! - YouTube
Virtual Museum of Calculators
Is Casio fx-82MS allowed at SAT test center? Asking this cause college board's eligible calculator list doesn't mention the Casio fx-82 series. : r/Sat