Casio FX-82ES Plus Original New Scientific Calculator 252 Function FX82ES | eBay
Virtual Museum of Calculators
CASIO SCIENTIFIC CALCULATOR FX-82ES PLUS FX82 FX-82 FX82-ES PLUS 2nd EDITION | eBay
CASIO fx-82ES PLUS 2nd EDITION | Casio
Vintage Casio fx-82 scientific calculator | eBay
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