Electronic retail store services via a global computer information network featuring control and sensors, gauges, pressure seals, current converters, connectors, flow orifice assemblies, tank gauges, flow tubes, flow simulators, thermocouples, thermowells, dewpoint measuring systems, temperature detectors, hand held terminals, electrochemical analyzers, conductivity measurements, sensors, strip chart recorders, electronic indicating recorders, circular chart recorders, digital indicators, positioners, controllers, chart recording controllers and strip charts, processing equipment, namely, computerized control systems used in manufacturing facilities to process materials, computer based controls and instruments, differential pressure transmitters, vortex meters, electromagnetic flow meters, mass flow meters, controllers and recorders for sensing and managing industrial process variables and related software, computerized supervisory control and data acquisition systems, remote monitoring equipment, safety systems, namely, computerized systems which indicate when measurements are inaccurate, alarms, fieldbus modules for communicating with field instrumentation, digital and analog input receiving devices, rectifiers, surge protectors, valves and uninterruptible power systems, including AC/DC power sources, generators, and battery operated back up power supplies