A Global Location Number (GLN) is a unique number that is assigned to locations to enable them to be identified uniquely worldwide. These global location numbers can be used to identify any legal, physical and functional locations. Global locations numbers are reference keys to computer files where information about the company or location can be found. The GLNs replace the names and addresses of locations and are particularly useful when automating processes; they allow computers to route information to the correct destination with no manual involvement. GLNs must be used when identifying locations and business partners within Electronic Data Interchange (EDI) business messages and data pools, and they can also be used in bar codes to identify a physical location or to provide relevant information for delivery or invoicing purposes.