building, construction and demolition services in the field of telecommunications, electrical, water, and oil and gas transmission and storage infrastructure; installation, maintenance and repair of alarms and security systems; installation, maintenance and repair of computers and telecommunications equipment; building maintenance and repair; application of coatings to wires; application of coatings to optical fibers; application of surface coatings; installation of storage facilities; installation of transmission lines; installation of electrical machinery and generators; installation of insulating materials; installation of lighting systems; installation of solar energy systems; installation of instrumentation systems; installation of cable television systems; installation, maintenance and repair of office apparatus; installation, maintenance and repair of machines; cleaning access to structures; maintenance of automated machinery; maintenance of office equipment; maintenance and repair of telecommunications, electrical, water, and oil and gas transmission and storage instruments; repair of electronic apparatus; repair of electric lines; repair of machinery; repair of office machines; repair of office machines and equipment; repair or maintenance of machines and systems for manufacturing integrated circuits; repair or maintenance of semiconductor manufacturing machines and systems; advisory services relating to the repair of civil engineering structures; advisory services relating to the repair of environmental control systems; advisory services relating to the maintenance of environmental control systems; electrical repairs, maintenance, and installation of electric wiring services; electrical systems installation services; services of installation of machinery; services of installation and maintenance of photovoltaic installations; interference suppression in electrical apparatus; laying of sea cables; laying of land cables; laying electric networks

telecommunication services, namely, personal communication services providing long distance telecommunication services, communication by electronic computer terminals providing access to global computer networks and other computer networks; telecommunication services, namely, transmission of voice, audio, visual, images and data by telecommunication networks, wireless communication networks, the Internet, information services networks and data networks; telecommunication services, namely, computer transmission of online based services accessed via network reference, namely, visual code barcodes, RFID tags, computer terminals, mobile devices; telecommunication services, namely, computer communication services, namely, providing online facilities for real-time interaction with other computer users concerning topics of general interest

scientific and technological services, namely, technical consulting and specialized engineering for others in the field of telecommunications, namely, assessment, design, engineering of fiber optics networks, multipair cables and structured wirings; design services for others in the field of industrial facilities and shopping centers; computer services, namely, temporary electronic storage of information and data for administration in the field of tax management and collecting