Whether for just-in-sequence production or reliable and seamless traceability of products or batches: Machine-readable and automated, contactless identification systems are being increasingly used in intelligent material flow and production control. Data Matrix Codes (DMC) and Radio Frequency Identification (RFID) are convincing as a result of their high data security. They have proven themselves in a whole raft of applications – even in rugged industrial environments. They significantly speed-up identification and reduce the amount of work involved when compared to manual identification and detection technologies. The main criteria for selecting the optimum data storage and identification technology are as follows: