Once the software is loaded into storage, it must be given specific
starting values before it can do work. These values are supplied
through a LOADxx parmlib member specified by the LOAD parameter through
the Hardware Management Console, 
HMCS,
system console
or the NIP console during the initialization process.
In certain situations, the system prompts you to specify an alternate master catalog; then it prompts for system parameters that are not specified in LOADxx. The following sections explain how to respond to those prompts.