Printer Job Language

Printer Job Language (PJL) is a method developed by Hewlett-Packard for switching printer languages at the job level, and for status readback between the printer and the host computer. PJL adds job level controls, such as printer language switching, job separation, environment, status readback, device attendance and file system commands. While PJL was conceived as an extension to Printer Command Language, it is now supported by most PostScript printers. Many printer vendors have extended PJL to include commands proprietary to their products. Not all PJL commands documented by HP are implemented in all HP or other vendor products. PJL resides above all the other printer languages and parses commands first. The syntax mainly uses plain English words.