PCL

Overview
PCL (Printer Command Language) is a popular page description language used to control printers. It was developed by Hewlett-Packard.

Specifications

 * PCL 5 Technical Quick Reference Guide
 * PCL 5 Technical Reference Manual Part 1
 * PCL 5 Technical Reference Manual Part 2

Software

 * OpenPCL
 * GhostPCL/GhostPDL

Sample files

 * http://openpcl.sourceforge.net/sample.pcl

Resources

 * Wikipedia article