70.10.Z - Activities of head office and holding companies, excluding financial holding companies
41.20.Z - Building works related to erection of residential and non-residential buildings
42.22.Z - Construction of utility projects for electricity and telecommunications
43.21.Z - Electrical installation
43.22.Z - Plumbing, heat and air-conditioning installation
70.22.Z - Business and other management consultancy activities
71.12.Z - Engineering activities and related technical consultancy
72.19.Z - Other research and experimental development on natural sciences and engineering
74.90.Z - Other professional, scientific and technical activities not elsewhere classified
85.59.B - Courses and training related to acquiring knowledge, skills, and professional qualifications in non-school forms