@meso It is all code. Yer TI-83 have a "GUI"? It's the same shit but with fewer buttons and a Z-80 instead of a fancy CPU. Type `python` or `irb`, then push exactly the buttons you would push on a calculator, but hit "Enter" instead of "=". Same shit comes out. You wanna click a "5" instead of pressing "5" on your keyboard? like_everything_on_it_is_a_calculator.png