Data processing machines and data processors; computers and computer terminals; programmable apparatuses (as contained in class 9); programmable and non-programmable bar code readers, bar code scanners; also with output page-at-a-time printers and continuous printers; machine readable bar code stickers; data processing programs on data carriers for the administration, monitoring, back-tracking, guidance, optimising and control of any goods and stock goods, in particular containers and container items for liquified or gaseous gases