Casio Scientific Calculator FX-82MS 3D model | CGTrader
Calculus - Finding Limits using Casio fx-82MS Scientific Calculator + Demo on Casio fx-9860GII - YouTube
Casio - FX-82MS. I bought it in high school, used it in University and now on my 4th year as a Professional Accountant. Haven't changed the battery once. : r/BuyItForLife