CASIO fx-82 SUPER. I bought it in 1.992, use it in college, at the university and 20 years more at the office. Never changed battery and im not going to retire it
fx-991ES PLUS | ES PLUS Series -Non Programmable- | SCHOOL & LAB. | Calculators | CASIO
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
Solving Quadratic Equation on Casio fx-82ES Plus [Calculator Trick - 2022] - YouTube