Let's get started by first learning how to navigate through this tutorial. At the bottom of each page you will find buttons which you can click on. Clicking on these buttons will cause you to go to another page within this tutorial. Here are the buttons and a description of where each one will take you.

Goes to the Table of Contents Page.
Goes to the previous page.
Goes to the next page.
Goes to the beginning of the chapter.

Go ahead, and click on this button so we can go on to the introduction, which is next page.