74.90.Z - Other professional, scientific and technical activities not elsewhere classified
42.22.Z - Works related to construction of telecommunications and electricity lines
43.21.Z - Electrical installation
43.29.Z - Other construction installation
43.99.Z - Other specialised construction activities not elsewhere classified
61.10.Z - Wired telecommunications activities
61.20.Z - Wireless telecommunications activities, excluding satellite telecommunications activities
61.90.Z - Other telecommunications activities
68.20.Z - Rental and operating of own or leased real estate
70.22.Z - Business and other management consultancy activities
71.12.Z - Engineering activities and related technical consultancy
74.10.Z - Specialised design activities
85.59.B - Other out-of-school forms of education, not elsewhere classified
