A data reading system for reading encoded data, such as barcode labels or RFID tags, from an item. Moreover, the invention relates to selective herbicidal compositions comprising, firstly, the phenyl-substituted bicyclooctane-1,3-dione derivates 33 and, secondly, a crop plant compatibility-improving compound. The present invention also relates to the microbial community present in the digestive tract and lumen in normal subjects, and subjects with digestive tract diseases, especially diseases of the colon, such as inflammatory bowel disease, including ulcerative colitis, Crohn’s syndrome, and pouchitis.