9 Apparatus and instruments for supply chain management in chemicals and fuels industries, namely, transceivers, modems, electronic or mechanical level sensors for chemicals and fuels, sensors for temperature and pressure measurement, stationary programmable logic controllers and computer hardware for data logging, mobile computing and operating platforms consisting of data transceivers, wireless networks and gateways for collection and management of data, fiber optic cables, coaxial cables, shielded cables for electrical or optical signal transmission, gateway routers and firewall systems in the nature of computer control hardware, wireless point of service devices; computer software to provide real-time, integrated business management intelligence by combining information from various databases and sensors and presenting it in an easy to understand user interface in the chemicals and fuels industries; computer software for wireless content delivery; wide area network operating software; information technology infrastructure of supply chain management in the chemicals and fuels industries, namely, transceiver interface software, communications software for connecting computer network users, data interpretation software, internet protocol software and user interface software for viewing sensor information, namely, storage tank level, pressure and temperature for the use of knowing existing inventory status and forecasting inventory consumption