Scientific, nautical, surveying, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus, instruments, parts and fittings; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; power supply units; portable power sources; chargers, charging apparatus, multiple battery charging apparatus; battery chargers, chargers for electric batteries; charging readers; terminals for charging devices; rechargeable batteries; battery testers; computer hardware; computer software; computer programs; computer peripherals, parts and fittings; electrical adapters, leads, cables, wires, extension cords, jumps, plugs, sockets; port replicators; modular jacks; circuit breakers; undercarpet wiring installations; power modules; transformers; including instructional materials sold together with the aforesaid goods, accessories, parts and fittings for all the aforesaid goods allowed in this class