72.19.Z - Other research and experimental development on natural sciences and engineering
71.20.B - Inspection and issuance of opinions on the technical condition of chimneys and ventilation ducts
73.20.Z - Market research and public opinion polling
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.
77.40.Z - Leasing of intellectual property and similar products, except copyrighted works
82.30.Z - Organisation of conventions and trade shows
85.59.B - Courses and training related to acquiring knowledge, skills, and professional qualifications in non-school forms
85.60.Z - Educational support activities