HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part I

EN Symbol Set 7-3
Symbol Set
Symbol set identifies the specific collection of symbols provided by a
font. Each symbol set is defined with a specific application in mind.
For example, the legal and math symbol sets were designed to
support legal and scientific applications. The following figure shows
two common symbol sets, PC-8 and Roman-8. The PC-8 symbol set
contains some special symbols and line draw characters not included
in the Roman-8 symbol set, while the Roman-8 set contains
European characters not contained in the PC-8 symbol set.
Note User-defined symbol sets are supported by some HP LaserJet
printers. See Chapter 10 for more information.
Figure 7-2 Symbol Sets