The best way to learn about a new computer program is usually to use it. You will get most out of this tutorial if you read it at your computer and work through the examples yourself. To make this easier the named data sets used in this tutorial have been stored on the file tutorial.lsp in the Data folder of the Macintosh distribution disk. To read in this file select the Load item on the File menu. This will bring up an Open File dialog window. Use this dialog to open the Data folder on the distribution disk. Now select the file tutorial.lsp and press the Open button. The file will be loaded and some variables will be defined for you.