52.21.Z - Service activities incidental to land transportation
42.12.Z - Construction of railways and underground railways
42.22.Z - Construction of utility projects for electricity and telecommunications
43.99.Z - Other specialised construction activities n.e.c.
68.20.Z - Rental and operating of own or leased real estate
71.12.Z - Engineering activities and related technical consultancy
74.90.Z - Other professional, scientific and technical activities not elsewhere classified
77.39.Z - Rental and leasing of other machinery, equipment and tangible goods n.e.c.
80.20.Z - Security systems service activities
85.59.B - Courses and training related to acquiring knowledge, skills, and professional qualifications in non-school forms