Some major sets of EDI standards: The UN-recommended UN/EDIFACT is the only international standard and is predominant outside of North America. The US standard ANSI ASC X12 (X12) is predominant in North America.

EDIFACT stands for Electronic Data Interchange For Administration, Commerce and Transport. It helped set standards for syntax rules to structure data and interactive exchange protocol.

EDI is a standard used for all business documents, like Purchase Orders, Ship Notice, Ship Manifest, Invoices and Freight Bills. EDI standards are used by companies that wants to conform to standard way of transacting business documents. X12 and EDIFACT are two widely used EDI standards.

12 x12 = 144

A square foot is measured 12''x12'' x12''x12'', or a 12'' square.