This standard describes nominal shapes@ sizes@ and printing positions of OCR-B alphanumeric characters and symbols for optical character recognition (OCR) systems.
INCITS 49-1975 history
2017INCITS 49-2017 Character Set for Optical Charater Recognition (OCR-B)
2000INCITS 49-2000 Character Set for Optical Charater Recognition (OCR-B) (formerly ANSI X3.49-1975; FIPS PUB 32)
1975INCITS 49-1975 Character Set for Optical Charater Recognition (OCR-B)