This document discusses automatic identification and data capture technologies used in supply chain and ERP systems. It describes several technologies including barcodes, RFID, biometrics, magnetic stripes, OCR, smart cards, and speech recognition. It then discusses how these technologies are used for supply chain visibility and mobile applications in areas like production, warehouse management, and process monitoring. Finally, it discusses the concept of the Internet of Things and how technologies like RFID could enable a future supply chain with complete visibility of products and inventory across the globe.