The HP-12C launched in 1981 and is still sold today, unchanged. The Casio fx-991 has 30+ million units in circulation. Some calculators just refuse to die.
Most people learn the formula once in school and never touch it again — until life forces them to. The HP-12C launched in 1981 and is still sold today, unchanged. The Casio fx-991 has 30+ million units in circulation. Some calculators just refuse to die.
RPN entry, financial-only, used by analysts and accountants for 40+ years. Survives by being the standard.
Workhorse scientific. Cheap, durable, banned-or-allowed depending on the exam board.
US high-school maths standard. Outlived multiple generations of phones.
Underrated scientific with WriteView display.
The original 1972 pocket scientific. Killed slide rules overnight.
Why is RPN still used? Reverse Polish Notation is faster once you learn it. Skips parentheses entirely.
Are graphing calculators dying? Slowly — apps and online tools do most of it. But classroom approval keeps them alive.
If you only remember one thing from this post, make it that the inputs matter more than the calculator.