Example image of eyePlorer eyePlorer map for 'Optical character recognition': Electronics Image Image scanner Mechanical Artificial intelligence Computer vision Pattern recognition Digital image processing Typeface United States patent law Photodetector David H. Shepard Frank Rowlett Louis W. Tordella National Security Agency Purple (cipher machine) United States 1951 1953 April 27 December 26 Intelligent Machines Research Corporation Reader's Digest Smithsonian Institution California Credit card Standard Oil Ohio Bell United States Air Force IBM OCR-A font Jacob Rabinow United States Postal Service General Post Office Girobank Canada Post Barcode Postal code Ultraviolet Raymond Kurzweil Charge-coupled device 1976 January 13 National Federation of the Blind Walter Cronkite Stevie Wonder Today (NBC program) LexisNexis Xerox Nuance Communications