How do optical character readers help postal services process mail?

Optical character readers (OCR) are essential tools in modern postal systems for automating the sorting process. These machines function by scanning address information—such as printed, typewritten, or even handwritten text—and comparing the observed characters against stored models or matrices to identify the destination.1

Once the address is read and verified, the OCR can either sort the mail directly or imprint a machine-readable bar code onto the envelope. This code allows subsequent high-speed automatic machines to route the mail efficiently to specific carrier routes or even individual blocks of addresses. By integrating this technology with postal codes like the ZIP+4 system, postal services can significantly increase processing speeds and maintain cost-effectiveness as mail volumes fluctuate.12

Beyond simple sorting, advanced multiline optical character readers (MLOCRs) and related automated systems help streamline operations by enabling the tracking of mail and providing detailed information about its processing and delivery status.2