https://www.youworkforthem.com/font/T1146/ocr-b-letterpress

The OCR-B is a set of monospace font developed in 1968 by Adrian Frutiger for Monotype by following the European Computer Manufacturer's Association standard. Its function was to facilitate the optical character recognition operations by specific electronic devices. It has been accepted as world standard in 1973. It follows the ISO 1073/II-1976, refined in 1979. It has been created to get financial features, bank-oriented specifically. It includes all ASCII symbols, and other symbols included for the bank environment. It is widely used for UPC codes' numbers. It shares the target with OCR-A, but it is easier for the human eye to read and it has a less technical look.