Compaq AlphaServer DS20E Reference Manual page 171

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Environment Variables
SRM has environment variables, a number of which are predefined and
correspond to locations in NVRAM. You can view the entire list of environment
variables and their values with the show command (there are quite a few of
them, so you will probably want to pipe its output to more). You can also use
the * (asterisk) wildcard to show variables matching a pattern. For example,
show boot* displays all the variables starting with "boot." The environment
variables are described in Section 7.23. Boot environment variables are
described in Chapter 4.
Using the SRM Console 7-3