Track-And-Trace

Bar codes are the most ubiquitous track-and-trace technology. They may be one- or two-dimensional, and are readable in a variety of ways. From what was originally a 'professionals only' operation, bar code reading has also become an option for the world's millions of camera cell phone owners, for whom another 'app' is available: the ability to use their phones to read a 2D bar code via a QR (Quick Response) code on product packaging, and connect via WiFi to retrieve product information and traceability.