The File Extensions Database

.73U File Extension

  • Developer by: Texas Instruments
  • Category: System Files
  • Format: Binary

What is an .73U file?

.73U is TI-73 Explorer Operating System File

File used by the Texas Instruments TI-73 Explorer advanced math and science graphing calculators; stores low-level system data that operates the calculator; used for applying periodic updates to the base operating system.

Programs that open TI-73 Explorer Operating System File
Texas Instruments TI Connect
Texas Instruments TI Connect

How to solve problems with 73U files

  • Associate the 73U file extension with the correct application. On :
    Windows: Right click on any 73U file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.73U files". Mac: Right click (or Ctrl-click) the 73U file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .73U is TI-73 Explorer Operating System File. Because only the current version supports the latest 73U file format. Search, therefore, e.g. on the Texas Instruments manufacturer website after an available .73U is TI-73 Explorer Operating System File update.
  • To make sure that your 73U file is not corrupted or virus-infected, get the file again and scan it with antivirus software.