HP-UX 11i December 2004 Release Notes

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ComputerOut Text displayed by the computer.
UserInput Commands and other text that you type.
Command A command name or qualified command phrase.
Variable The name of a variable that you may replace in a command or function
or information in a display that represents several possible values.
[] The contents are optional in formats and command descriptions. If the
contents are a list separated by |, you must choose one of the items.
{} The contents are required in formats and command descriptions. If the
contents are a list separated by |, you must choose one of the items.
... The preceding element may be repeated an arbitrary number of times.
| Separates items in a list of choices.