Sun Internet Mail Server 3.5 Reference Manual:

What Typographic Changes Mean

The following table describes the typographic changes used in this book.TABLE P-1 Typographic Changes in Text Typeface or Symbol Meaning Example AaBbCc123 The names of commands, files, and directories; on-screen computer output is printed using courier font. Edit your .login file. Use ls -a to list all files. machine_name% You have mail. AaBbCc123 What you type, contrasted with on-screen computer output is printed using bold courier font. machine_name% su Password: AaBbCc123 Command-line placeholder; replace with a real name or value are printed using italic text. To delete a file, type: rm filename. AaBbCc123 Book titles, new words or terms, or words to be emphasized are printed using italic text. Read Chapter 6 in User's Guide. These are called class options. You must be root to do this.

Typeface or Symbol	Meaning	Example
`AaBbCc123`	The names of commands, files, and directories; on-screen computer output is printed using courier font.	Edit your `.login` file. Use `ls -a` to list all files. `machine_name% You have mail.`
`AaBbCc123`	What you type, contrasted with on-screen computer output is printed using bold courier font.	`machine_name%` `su` `Password:`
AaBbCc123	Command-line placeholder; replace with a real name or value are printed using italic text.	To delete a file, type: `rm` filename.
AaBbCc123	Book titles, new words or terms, or words to be emphasized are printed using italic text.	Read Chapter 6 in User's Guide. These are called class options. You must be root to do this.