You can use it like normal but you can load load up programs for the environment. The image of the calculator has working buttons and will show the boot screen just like the real thing. After agreeing that you’re not getting any ROMs from his site you can choose the file to load on your browser. calls the project jsTIfied because he wrote it in JavaScript and HTML5 (that’s where the js comes from) and it’s based on the Texas Instruments line of hardware (hence the capital TI). But if you have one of the supported calculators (TI-83+, TI-83+ SE, TI-84+, or TI-84+SE) you can dump the image yourself and this should work like a charm. As with pretty much all emulators, this depends on a ROM image from the actual hardware to work. You can leave the TI graphing calculator at home thanks to this web-based TI-83 and TI-84 emulator.