HP Tru64 UNIX Version 5.1B-2 and Higher Patch Kit Installation Instructions (March 2009)

Variable
The name of a placeholder in a command, function, or other syntax display
that you replace with an actual value.
device names Operating system versions before Version 5.0 use different names than those
of Version 5.0 and higher. In general, this manual uses the Version 5.0 names.
For example, where a partition name is represented by /dev/disk/dsk3g,
the Version 4.0n name might be /dev/rz3g.
Typographic Conventions 11