This presentation discusses various identification systems used in packaging, focusing on barcodes and RFID. It describes how barcodes work by using a machine-readable representation of data that can be scanned by optical readers. Common barcode types include linear barcodes like UPC and 2D codes like QR codes. RFID uses radio transponders to automatically identify objects without line of sight scanning. Barcodes are widely used now but RFID may provide advantages in the future with contactless identification of multiple items simultaneously.