Postal Service: Information on the Change to Multiline Readers for the Zip Plus 4 Program

In response to a congressional request, GAO reviewed the Postal Service (USPS) Board of Governors' most recent actions in connection with the ZIP-Plus-4 program concerning the switch from single-line to multiline optical character readers (OCR), specifically: (1) how much savings USPS forgoes each workday it operates without multiline OCR; (2) whether USPS will end up with a suitable single-line-converted-to-multiline machine; (3) what use USPS will make of the single-line OCR that are not converted to multiline technology; and (4) whether the latest USPS estimate of future ZIP-Plus-4 use is realistic.