Barcode technology was invented during World War II

The barcode, now ubiquitous in retail and logistics, has military origins traceable to WWII. Researchers developed early automated identification systems to track military supplies and equipment. These initial systems used optical technology to read encoded information, establishing machinery-could-interpret-visual-patterns principle. Post-war researchers developed this further for civilian purposes, particularly freight and inventory management. Modern barcode systems emerged in 1960s-1970s when researchers developed standardized encoding and reliable laser scanning technology. IBM developed the first barcode symbol (later standardized as UPC) in 1972. The first commercial supermarket scanner installed in 1974 began retail transformation. Early resistance from retailers concerned about cost gave way to efficiency gains in inventory and checkout. Barcodes represent billions in annual commerce. This demonstrates how military development often precedes civilian applications.