| 1. Building, Civil Engineering Works and Consultancy Services |
| 2. Consulting Engineers or Designers |
| 3. Electrical and Electronic |
| 4. Electronic Components |
| 5. Engineering Technical Services |
| 6. Machine Builders |
| 7. Machinery, Plant and Equipment |
| 8. Mechanical Contractors |
| 9. Mechanical Engineering Design |
| 10. Metallurgical and Engineering Services |