TSO1073/ NTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEKIYHAPOHA OPTAHM3ALIM IO CTAHIAPTW3ALWM.ORGANISATION INTERNATIONALE DE NORMALISATION Alphanumeric character sets for optical recognition -- Part I : Character set OCR-A -- Shapes and dimensions of the printed image Jeux alphanumeriques de caracteres pour la reconnaissance optique-Partie / : Jeu de caracteres ROc-A- Formesetcotesde I'image imprimee First edition 1976-12-01 Corrected and reprinted - 1979-05-15 ISO1073/I-1976 (E) UDC 681.3.048 : 655.24 Ref.No. 1SO 1073/1-1976 (E) Descriptors:dataprocessing,optical recognition,alphanumericcharacter sets,OCR-Acharacter sets,specifications,dimensions Price based on 26 pages st andar dgg FOREWORD ISO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through iso Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International StandardsbytheIsOCouncil, International Standard ISO 1073/l was drawn up by Technical Committee Iso/Tc 97, Computers and information processing, and was circulated to the Member Bodies in May 1975. It has been approved by the Member Bodies of the following countries : Belgium Japan Turkey Czechoslovakia Netherlands United Kingdom France New Zealand U.S.A. Germany Romania U.S.S.R. Hungary South Africa, Rep. of Yugoslavia Italy Switzerland The Member Body of the following country expressed disapproval of the document on technical grounds : Brazil This International Standard, together with ISO 1073/ll, cancels and replaces IS0 Recommendation R 1073-1969. @ International Organization for Standardization, 1976 : PrintedinSwitzerland st andar d999 ISO 1073/I-1976 (E) INTERNATIONAL STANDARD Alphanumeric character sets for optical recognition -- Part I : Character set OCR-A - Shapes and dimensions of the printed image 1 GENERAL 1.3.2 OcR-B : A repertoire of 121 characters comprising digits, capital and small letters, all the graphics specified in 1.1 Scope the ISO 7-bit coded character set (ISO 646-1973), national letters, diacritical signs and further graphics. (See part Il.) This International Standard for character shapes and sizes is intended to facilitate and foster the use of Optical 1.3.3 printing frame : The smallest rectangle the sides of Character Recognition (OCR) in data processing, by defining which are horizontal and vertical and which includes the character shapes suitable for both human and machine centreline shapes of all characters with the exception of reading. long vertical mark. It establishes a common basis for printing equipment and 1.3.4 sizes of a repertoire : The sizes specified by the optical scanning equipment for OcR interchange appli- height H and the width W of the relevant printing frame. cations. Additional International Standards will cover the print NOTES quality and the relevant characteristics of the formats Three sets of sizes are specified in order to permit the use of the OcR character sets with a wide range of printing equipment with needed to satisfy interchange requirements. different print quality characteristics. Devices such as typewriters, cash registers, numbering machines, high-speed printers, credit card 1.2 Field of application as letterpress and offset, are all involved. This International Standard specifies the printed image 2Forapplicationswhich involvecirculationofdocumentsacross shapes and sizes of alphanumeric characters, graphics and boundaries between areas in which different national characters symbols designed for use in Optical Character Recognition. are in use, agreement between the sender and the recipient of