ABSTRACT
A globally unique identifier is the reference number system originally developed to generate unique identifiers in computer software, but the concept is readily adapted for general inventory and database purposes. Additive manufacturing comprises a group of technologies that fabricates parts through a buildup process. All of these technologies start with raw material and a computer-aided design file. The information of interest to store on a part is that which can be used to guide any Direct digital manufacturing technique, or combination of techniques, in accurate reproduction of the part. Computer tomography takes as series of X-ray scans that map cross-sectional slices of a part and then assembles them into a 3D map. The decision tree for 2D barcode marking is essentially the same as those presented for alphanumeric marking. The one essential difference is that 2D barcodes require an optical reader.
