Solution of Quadratic Equation with Scientific Calculator | CASIO fx-82MS - YouTube
calculators/Casio fx-82SUPER - calculator.org
Virtual Museum of Calculators
User manual Casio FX-82 Solar (English - 38 pages)
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