Printer control language (PCL),
Definition of Printer control language (PCL):
Proprietary software (belonging usually to a printer manufacturer such as Hewlett Packard) that instructs a printer how to print a page. In comparison with page description-languages (such as Adobes PostScript), PCLs do not offer device independence and a wide range of choices.
Meaning of Printer control language (PCL) & Printer control language (PCL) Definition