Casio Scientific Calculator: owned since 1999, used through high school years 8 - 12, a degree in accounting, my current workhorse in my underwriting job. Maybe my favourite possession. : r/BuyItForLife
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
Vintage Casio fx-82 scientific calculator | eBay
Virtual Museum of Calculators
Amazon.com: Casio Fx-82es Fx82es Plus Bk Display Scientific Calculations Calculator with 252 Functions : Office Products
Js-82ms-a Black Style Functions 10+2 Digits Scientific Calculator with Button Battery - China Desktop Calculator, Office Calculator | Made-in-China.com