1.2 Conventions
Following are examples of the typographical and graphic conventions used
in this guide:
     
- Functions, utility program names, standard names,
and classes.
     
- Option flags
     
- File names
- Variables
     
- `Emphasis'
     
- [optional information or parameters]
     
- Examples are described by text
              and then shown this way.
 
- Commands that are entered by the user are shown as preceded by a prompt string
comprising the $character followed by a space.