low energy electrical circuits for data communication, telecommunications applications, and control engineering; apparatus for monitoring, measuring, testing and controlling electrical signals; overvoltage and electrical current protection apparatus, namely overvoltage arrestor magazines and overvoltage arrestor modules; electro-technical and electronic components, apparatus, and instruments, namely varistors, transistors, resistors, and printed circuit boards; electrical cables, electrical wires, electrical conductors, and electrical terminal and connection parts therefor; electric switches, electrical distribution panels and boxes and cabinets therefor; devices for electrical telecommunication, namely fiber optic cables and light guides, fiber optic terminals and apparatus for the transfer, distribution and connection of fiber optic transmissions, namely optical receivers, optical transmitters, and optical fibers; telephone installations comprising exchanges; interfaces and inquiry stations for electronic data processing; public exchange lines, terminals for an integrated service digital network (ISDN); telefax apparatus and connecting wires therefor; telephones; modems; facsimile machines for television, telephone and telescopy transmission and parts therefor; electronic computers; computer programs for use in telecommunication and data transfer; information display devices, namely light emitting diode and electro-luminescence displays and illuminated advertisement boxes; split flap and rolling band display devices and control units, monitors, and program to operate such information display devices