Compaq AlphaServer DS20E Reference Manual page 179

The help (or man) command displays basic information about the use of console
commands when the system is in console mode. The syntax is:
help (or man) [command . . . ]
command . . .
Command or topic for which help is requested. The options
are:
none
command_name
argument_string
(such as "sh")
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Displays the complete list of commands
for which you can receive help.
Displays information about the console
command.
Displays information about all commands
that begin with that string.
Using the SRM Console 7-11