Assembly, maintenance and repair of installations, devices and apparatus in the field of operating systems and traffic control systems, namely, assembly, maintenance and repair of railway traffic control equipment, railway signals, communication equipment used in railway operating systems and traffic control systems, and computer hardware and computer peripherals used in railway operating systems and traffic control systems

Installation, maintenance and repair of installations, equipment, and apparatus all in the field of traffic operating systems and traffic control systems, namely, installation, maintenance and repair of railway traffic control equipment, railway signals, communication equipment used in railway operating systems and traffic control systems, and computer hardware and computer peripherals used in railway operating systems and traffic control systems