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Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

This website has been deprecated and exists as an archive only.

The TORTOISE website has been moved to https://tortoise.nibib.nih.gov.

For any information about TORTOISE generation V3.x.x, please refer to the new website.

3.2.5 Quit

Use this button to safely exit the software. It is recommended to always use the Done and quit buttons throughout the software for proper functionality.

Note, it is also highly recommended to quit the software when loading in a new dataset. This will assure that all variables will be properly re-set before processing new data.