Scientific, electrical and electronic apparatus and instruments for the transport, conveyance, distribution, transformation, accumulation,regulation, filtering, measuring, detection, control or guidance of electrical current, comprising electrical or electronic components for such apparatus and instruments, rectifiers, semi-conductors, electrical relays, condensers, inductive resistors, calculating machines, static converters, computer and computer programs, supply systems for computers, safety micro systems for computers, continuous electrical supplies, inverters, batteries, accumulators; apparatus for the supply, filtering, transformation, maintenance and storage of electrical energy; computer software

Installation, repair and maintenance (either on-site or by electronic communication) of electrical apparatus and computer software