Skip to main content
U.S. flag

An official website of the United States government

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.

1.1 Organization

This guide is organized as follows:

  • In the Introduction, a brief overview of the software is given including system requirements and software installation.
  • In Software Overview, we briefly describe the functionality of the software.
  • In Usage, instructions on how to use the software are given.