Scientific apparatus and instruments; electrical and electronic apparatus and instruments; electrical connectors, contacts, conductors, condensers, coils, capacitors, circuits and circuitry, terminals, taps, splices, transformers, wiring devices, rectifiers, modulators, filters, regulators, pulse-forming networks, surge suppressors, switches; switching apparatus and instruments; electrical power supplies; electrical insulators; coaxial and fiber optic connectors, terminals, contacts, splices; electrical patchcards and patchcard programming systems; patch panels, distribution boxes, and cable management hardware; electrical, coaxial, fiber optic ribbon and flexible flat cables and cable assemblies; computer hardware; parts and fittings for all of the aforesaid goods