Barcode Glossary A


Barcode-Glossary A

  • Add-On Symbol

  • A symbol for the encoding of information with which the data of a main symbol are supplemented. The two and five digit add-on symbols (additional code) can be used in connection with EAN and UPC symbols.

  • AIM

  • AIM is the abbreviation for Automatic Identification Manufactures, Inc. in 1326 Freeport Road, Pittsburgh, PA 15238.

  • Algorithm

  • A sequence of steps taken for a certain calculation.

  • Alphanumeric

  • The display of an item consisting at least of a mixture of decimals and the letters of the alphabet is called alphanumeric; contrary to the purely numeric (only digits) and the purely alphabetic encoding. In the alphanumeric display, often other characters are also used (punctuation marks, special characters, etc.).
    See "Character Subset".

  • ANSI

  • ANSI is the abbreviation for American National Standards Institute, USA. This is an organization sponsored by the Business Equipment Manufacturers Association (BEMA), an amalgamation of office machine manufacturers, for the purpose of setting voluntary industrial standards.

  • Aperture

  • The opening of an optical device, for example a camera or a photometer. Most (apertures) openings are circular; rectangular or elliptic openings are also possible.

  • Application Standard

  • Specifications defining methods and conditions under which the barcode technology can be utilized for a certain purpose. For example, they specify the data format, the optical requirements and symbology-related parameters as a subset of the fixed scope formed by relevant technical standards.


  • Abbreviation for "American Standard Code for Information Interchange": a computer code consisting of 128 alphanumeric characters and control characters. Each character is encoded in 7 bits (8 including the parity bit) and enables the information exchange between computer systems. This standard is specified in ISO 646.
    This is the standard code for the exchange of information between data processing systems, communication systems, etc. A digit from 0 to 255 is allocated one character each. For example, the computer emits the value 65 and the printer prints out the upper-case letter "A", as the value 65 is allocated to this letter.

  • Autodiscrimination

  • The ability of a barcode reading device to automatically make a difference between two or more symbologies (e.g. Interleaved 2 of 5, Code 39).

  • Auxiliary Character

  • A symbol character representing non-data characters as, for example, start and stop characters, shift or functional characters.
    See "Overhead".