HP-UX 11i Version 1 Installation and Update Guide, June 2004

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[ ] and | Brackets [] enclose optional items in command syntax.
The vertical bar | separates syntax items in a list of
choices. For example, you can enter any of these three
items in this syntax:
ls [-a | -i | -x]
Enter Text in this bold, sans-serif font denotes keyboard keys
and on-screen menu items. A notation like
Ctrl-Q
indicates that you should hold the
Ctrl key down and
press
Q. It is also used to display web page links.