Casio Scientific Calculator: owned since 1999, used through high school years 8 - 12, a degree in accounting, my current workhorse in my underwriting job. Maybe my favourite possession. : r/BuyItForLife
FX115ESPLUS 2 X Casio fx-115ES PLUS Engineering/Scientific Calculator
Casio FX-350MS 2nd Gen Non-Programmable Scientific Calculator, 240 Functions and 2-line Display : Amazon.in: Office Products
Amazon.com : New CASIO Scientific Calculator FX-350ES Plus : Electronics : Office Products
Casio FX-350MS 2nd Gen Non-Programmable Scientific Calculator, 240 Functions and 2-line Display : Amazon.in: Office Products