He saved the program under a new name: .
Though it has since been succeeded by the fx-CG series (Prizm), the fx-9860 remains one of the most reliable, efficient, and widely used graphing calculators in educational history. For students, engineers, and surveyors who prioritize battery life, speed, and raw calculation power over fancy color screens, the fx-9860 is still the weapon of choice. casio fx-9860
: To clear data, navigate to the System menu to reset main and storage memory [28]. He saved the program under a new name:
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. : To clear data, navigate to the System
A variant popular in Europe and Asia, the "SD" model featured an SD card slot. This allowed users to transfer data between calculators with ease and store massive libraries of formulas, text files, and add-on applications. For professionals who used the calculator for field work (such as surveying), the SD slot was an invaluable tool for data logging.
He had written a tiny program in the calculator’s BASIC-like language—just 47 lines. It simulated a simple ecosystem: foxes, rabbits, grass. But he’d added a twist: a variable he called “memory.” Each rabbit remembered whether the last patch of grass it visited was safe or not. Nothing complicated. But over 10,000 simulated days, something strange kept happening.
Then he closed the cover, slid the calculator into his backpack, and lay down. He didn’t sleep. He was thinking about the seven states, and about how many other patterns might be hiding in the calculator’s small, patient memory—waiting for someone bored enough, or curious enough, to let them out.