Data processing equipment and computers; monitoring and control systems, apparatus and equipment; programmable monitoring and control units; programmable local and remote control and monitoring units for monitoring and controlling mining plant and equipment and industrial plant and equipment for use in quarries, ports, steel works and power stations; monitoring and control systems, programmable monitoring and control units, conveyer protection devices and loudspeaker communications systems for use in mines, quarries, ports, steelworks, power stations, and/or for use in fans, pumps and bunkers; monitoring and control systems; tracking apparatus and equipment; apparatus and equipment for tracking and identifying personnel, vehicles and equipment; protection devices for industrial plant, equipment and apparatus; conveyer protection devices; belt protection devices; apparatus, equipment and devices for monitoring and protecting of conveyor belting and structure; detection apparatus, equipment and devices; warning apparatus, equipment and devices; communications apparatus, equipment and systems; loudspeaker communications apparatus, equipment and systems; cables; integrated loudspeaker communications systems; integrated monitoring and control systems for mining and other industrial applications; computer software and computer hardware; computer peripherals; power supplies and relays; telemetry systems; keypads; programmable electronic data recording apparatus; apparatus and equipment for use as on board vehicle recorders; driver logging and performance monitoring apparatus; apparatus for recording work operations and vehicle movements and events; vehicle control apparatus; monitoring devices, display devices; personnel and vehicle tracking apparatus; personnel and vehicle tracking apparatus using radio frequency identification technology (RFID); personnel and vehicle tracking apparatus for use in mines; computer networks; wireless communication apparatus; intrinsically safe wireless communication apparatus; closed circuit television cameras; visual display screens; low voltage switching devices; parts and fittings for all the aforesaid goods