42.22.Z - Works related to construction of telecommunications and electricity lines
33.13.Z - Repair and maintenance of electronic and optical equipment
33.14.Z - Repair and maintenance of electrical equipment
33.20.Z - Installation of industrial machinery and equipment and outfit
42.21.Z - Works related to construction of transmission pipelines and distribution networks
43.21.Z - Electrical installation
43.29.Z - Other construction installation
61.10.Z - Wired telecommunications activities
61.20.Z - Wireless telecommunications activities, excluding satellite telecommunications activities
62.09.Z - Other information technology and computer service activities
71.12.Z - Engineering activities and related technical consultancy
74.10.Z - Specialised design activities
80.20.Z - Security systems service activities
95.11.Z - Repair and maintenance of computers and peripheral equipment
95.12.Z - Repair and maintenance of (tele)communication equipment
