device for electronic review and evaluation of data

摘要

The computer-based management system has a number of personal computers (100) interconnected by a modem (103) onto a network. Access is provided by bar-code cards that are passed through readers (202). These connect with a bit bus coupling (206), having a decoder (208), test sum checking stage (210) and an interface (212). A number of these access points are coupled to the network. The individual consumption of an individual on a daily or weekly basis is logged on the basis of card entries.