A bar code (often seen as a single word, barcode) is the small image of lines (bars) and spaces that is affixed to retail store items, identification cards, and postal mail to identify a particular product number, person, or location.
Computer numerical control (CNC) is a method for automating machine tools through software embedded in an attached microcomputer. CNC is commonly used for manufacturing metal and plastic parts.
GDSN (Global Data Synchronization Network) is an internet-based network that enables trading partners to exchange product-identification data in a standardized way in real time.
SKU (stockkeeping unit, sometimes spelled "Sku") is an identification, usually alphanumeric, of a particular product that allows it to be tracked for inventory purposes.