Programmable Barcodes are used in Grocery Stores for products that have been weighed and pre-packed using a Label Printing Scale.
The PDF datasheet explains how to setup the global options to support this feature. Hardwired Formats and barcodes starting with 02 and 2 is explained.
www.idealpos.com.au/downloads/Knowledgebase/Programmable_Barcodes.pdf