Abstract: The invention is a method and system for printing images to a substrate wherein the commands normally input by an operator, or resident within the printer, can be determined at a host data processor. The system can control address and postal code printing functions beginning at the host computer together. The system will derive printing data, including address data, from a selected application resident in the host computer. The host computer creates and then transmits printer command sets and printing data, via transmitting means to a microprocessor within the printer. The microprocessor drives a language interpreter which directs the printer commands to a parsing step for determining the address location from within the data to be printed. The language interpreter then assigns delivery point digits to a zip code that was isolated from the transmitted address data. The newly created zip code is then matched with the bar code data stored within the microprocessor's corresponding memory.