Technical testing and research
- 71.20 — Technical control and analysis
- 85.59 — Other education n.v.d.g.
- 69.20 — Activities in the field of accounting and auditing; tax advice
- 71.12 — Activities in the field of engineering, geology and geodesy, provision of technical advice in these areas
- 72.19 — Research and experimental development in other natural sciences and engineering
- 74.90 — Other professional, scientific and technical activities, n.v.d.g.