Definition / Belongs to this divisionThis division includes:
- the activities of organizations whose members are primarily interested in pursuing a particular discipline or a particular profession or in a technical field, such as medicine, law, accounting, engineering, architecture, etc.
- professionals in science, academia and culture, such as writers, painters, various performers, journalists, etc. community, interest representation activities of its associations and chambers
- dissemination of information, professional practice requirements, setting and monitoring of standards, (interest) representation before government agencies and public relations activities
also belongs to this sectorThis division also includes:
- activities of scientific societies
It does not belong to this sectorThis division excludes:
- educational activities of the above mentioned organizations, see sector 85

Definition / Belongs to this divisionThis division includes:
- implementation and legislative management of central, regional and local government bodies
- financial management and control
- administration and supervision of tax matters
- collection of taxes, duties, levies, tax audits and investigations on goods
- customs administration
- budget implementation, central funds and public debt management:
- raising, receiving and controlling the disbursement of money
- general, comprehensive research and development policy and the management of related financial resources and funds
- comprehensive economic and social planning, management and operation of the statistical service at different levels of government
It belongs to this branch - Hungarian supplementThis division includes - Hungarian supplement:
- ancillary services provided to government (eg personnel matters, employment policy and other, eg centralized procurement)

Definition / Belongs to this divisionThis sector includes a wide range of services normally provided to business customers. This includes activities that require a high level of professional, scientific or technical knowledge, but does not include current day-to-day, usually short-term, normal business activities.

This division includes:
- business agency activities, such as conducting the purchase and sale of small and medium-sized enterprises, including expert activities, except real estate agency services
- patent agency (arranging the purchase and sale of patents)
- valuation activities (antiques, jewelery, etc.), except valuation of real estate and insurance
- reviewing, checking and verifying invoice and document information on freight rates
- weather forecast (meteorology)
- security advice
- agricultural advice (agronomic, agricultural economic activity)
- environmental advice
- other technical consultancy (not in the field of engineering)
- other, non-engineering, non-architectural and non-business consultancy
- preparation and control of the construction budget
also belongs to this sectorThis division also includes:
- arranging contracts on behalf of private individuals, in cinematographic, theatrical or other entertainment productions, sports (eg performing for performers, amateurs, athletes, finding opportunities, opportunities for action, sporting events, etc.)
- books, toys, works of art, photographs, etc. placement with publishers, producers
It belongs to this branch - Hungarian supplementThis division includes - Hungarian supplement:
- technical, economic and other professional books, manuals, documents, etc. except for copyright recipients.
It does not belong to this sectorThis division excludes:
- auction sales of used vehicles, see 45.1
- retail sale of auction houses, see 47.79
- on-line auction retailers, see 47.91
- real estate activities, see 68.31
- accounting, see 69.20
- business management consultancy activities, see 70.22
- architectural and engineering activities, see: 71.1
- design of machinery and equipment, industrial design, see 71.12, 74.10
- veterinary inspection and control of foodstuffs, see 71.20
- advertising, placement of advertisements and other advertising design, see 73.11
- organization of exhibitions, congresses and trade shows, see 82.30
- independent auctioning, see 82.99
- administration of loyalty programs, see 82.99
- consumer credit and debt advice, see 88.99
It does not belong to this branch - Hungarian supplementThis division excludes - Hungarian supplement:
- the technical drawing, see 71.1
- individual activities of the writer on any subject, including the writing of novels and the production of professional publications, see: 90.03

Definition / Belongs to this divisionThis sector includes professional, scientific and technical services (except: legal and accounting services, architectural and engineering activities, technical testing and analysis, business and management consultancy activities, research and development and advertising).