# A Few Introductory Words

This documentation applies to the ithink® and STELLA® software. As you can see by scanning the table of contents, our aim in preparing this documentation is to provide you with essential "how to" information concerning the use of the software. Use this documentation on an as-needed basis. Whenever you require more information about the features, operation, or inner workings of the software, look here.

This introductory chapter is intended to provide you with a big picture overview of how the software works. Once you have the big picture firmly in mind, you will be in a good position to learn more about the specific features and operational details of the software.

This chapter begins with an overview of the software's three-layer operating environment. Then, the Chapter provides some simple suggestions for using the documentation in the most effective manner. Finally, the introduction concludes with an overview of the features that are new to version 8.