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; 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, namely, interface units for electronic data processing and connecting wires therefor; [telephones;] modems; [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]

installation, assembly and maintenance and repair of data communication circuits, overvoltage and electrical signal detection, modules, printed circuit boards and electrical and electronic devices, fiber optic telecommunication equipment, telecommunication apparatus,[ computers, and illuminated advertising equipment and split flap and rolling band display monitors]