Barcode

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Definition

Barcodes are machine-readable numbers used as stock control mechanisms by retailers: as such they are highly standardised and well recognised, and form an invaluable identifier for communication between companies. On physical releases, they usually appear in the form of a series of black and white bars, hence the name "barcode".

There are many different types of barcode, but the ones usually found on music releases are two:

  • Universal Product Code (UPC), which is the original barcode used in North America. They are 12 digits long, but any number of zeros at the start can be left off, so the actual printed barcode can be shorter than this.
  • European Article Number (EAN) also known as Japanese Article Number (JAN), which is widely used in the rest of the world. The 13 digit type (EAN-13) is the most common, although there are others such as EAN-8. A UPC can be turned into an EAN-13 by adding a leading zero.

Other identifiers

Resources

List of country codes to find where an EAN comes from.