In production and logistics, the identification of goods and materials through universally usable barcodes controls many processes. The area of application of readers is correspondingly broad – from mobile hand-held operation to high-speed scanners for industrial applications.
Two-dimensional codes mostly consist of square-shaped groups of data cells (matrix) with a typical orientation symbol from which the code type can be recognized. Thus, 2D-identification is ideally suited for additional applications, such as parts tracking, in which codes are directly affixed to the work piece.
With RFID, no direct ``visual contact`` between the read-write unit and transponder is necessary. Information from the transponder is received by means of electromagnetic waves. As a result, these systems can be used practically and reliably under even the most adverse conditions.