Casio Fx-9860 ((install)) Jun 2026

This article dives deep into the history, models, features, and hidden capabilities of the Casio fx-9860 series, explaining why it remains relevant in an age of smartphone apps.

Here’s a short story inspired by the graphing calculator.

No tool is perfect. Here is what the fx-9860 cannot do well.

While the TI-84 dominates the American market, the fx-9860 is the preferred weapon of choice for the International Baccalaureate (IB), many European curricula, and professional exam boards like those in the UK, Australia, and India. Why?

The SH-4A CPU running at 29 MHz might sound slow compared to a smartphone, but for mathematical computation, it is instantaneous. A complex matrix inversion (10x10) takes under two seconds. Numeric integration finishes before you finish typing the problem.

Every fx-9860 includes a basic spreadsheet. You can enter data into a 26-column x 999-row grid, perform statistical regression (linear, quadratic, logistic), and then draw a scatter plot directly from the cells. This is a lifesaver for economics and biology stats.