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
FX-82ES Casio Fx-82es Fx82es Plus Bk Display Scientific Calculations Calculator with 252 Functions
Casio Fx-82 Za Plus Ii Calculator - Momentum Multiply Online Shop
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How To Calculate Log BaseN on Casio fx-82MS & Casio fx991ES Scientific Calculators - video Dailymotion
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