.8XK File Extension
File TypeTI-83 Plus Application Upgrade File
What is an 8XK file?
File used by the Texas Instruments TI-83 calculator, an advanced math and science graphing calculator; contains application upgrades, such as interactive study card and data manipulator programs; used for TI-83 Plus and TI-83 Plus Silver Edition models.
For operating system upgrades for the TI-83 Plus models, see .8XU files.