Assigns a value to a system parameter as it exists in the SYSGEN work
area.

Format
    SET parameter-name value

This command does not modify parameter files, the system image on disk,
or the active system.  See the WRITE command for these functions.

Example
    SET PFCDEFAULT 20

Additional information available:

parameter-namevalueQualifiers

Name of a system parameter.  Use the SHOW /NAMES command to obtain the
names of all the system parameters.

An integer value or the keyword DEFAULT; integer values must be within
the minimum/maximum values unless DISABLE CHECKS was specified; DEFAULT
means the default value for the parameter.

Additional information available:

/OUTPUT/STARTUP

Specifies that any output from subsequent commands is to be directed to
an output file.

Defines the name of the command procedure to be executed when the
system is booted.

Format
    SET/STARTUP file-spec

The default startup command procedure is SYS$SYSTEM:STARTUP.COM.  The
file specification can be a maximum of 31 characters long.