When you first enter SCA, the SCA Main window is displayed.  The SCA
     Main window allows you to set (or change) your SCA library.  If no
     library has been previously set or you want to replace the current
     setting, simply type the directory specification of the directory
     containing the library in the space labelled "Enter library
     directory specification to replace current list:", then either
     type a carriage return or click on the APPLY button.

     Once a library has been set, you can display the modules in the library
     by double clicking on the library name or you can bring up one of the
     four other primary SCA windows by clicking on the appropriate button at
     the bottom.

     For more information, double click on one of the additional topics
     listed below.