The File Extensions Database


.TNO File Extension

  • Category: Disk image (ISO) binary Files

What is an .TNO file?

.TNO is Handheld Operating System image

The tno file extension is mainly related to Handheld Operating System used in TI-Nspire devices from Texas Instruments. Devices for math and scientific operations.

The tno file stores image from Handheld Operating System.

This tno file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.


How to open:

Probably not meant to be accessed by the user.

How to convert:

Probably cannot be converted to anything else.

How to solve problems with TNO files

  • Associate the TNO file extension with the correct application. On :
    Windows: Right click on any TNO file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.TNO files". Mac: Right click (or Ctrl-click) the TNO 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 .TNO is Handheld Operating System image. Because only the current version supports the latest TNO file format. Search, therefore, e.g. on the manufacturer website after an available .TNO is Handheld Operating System image update.
  • To make sure that your TNO file is not corrupted or virus-infected, get the file again and scan it with antivirus software.