Couplers (data processing equipment); Interfaces (for computers); Enlarging apparatus (photography); Cables, electric; Wires, electric; Identification threads for electric wires; Fibre optic cables; Junction sleeves for electric cables; Coaxial cables; Material for electricity mains (wires, cables); Amplifiers; Audio and video receivers; Wire connectors (electricity); Converters, electric; Connections for electric lines; Optical fibers (light conducting filaments); Connectors (electricity); Wearable video display monitors