(Printer Command Language) The language used to control computer printers. Introduced in the 1980s by computer manufacturers Hewlett-Packard and under constant development ever since, PCL allows application programs to control the functions of different printers in a standardized, efficient manner. PCL commands are embedded in the data flow of the print job. Compared to the Postscript page description language developed by Adobe, PCL is usually faster and requires less memory. However, the functionality of this language is less general in scope, which means that it is not suitable for all output devices.