 |
| filling system: 35 phrases in 21 subjects |
| Astronautics | 2 |
| Automobiles | 1 |
| Aviation | 3 |
| Computers | 1 |
| Construction | 4 |
| Energy industry | 2 |
| Food industry | 1 |
| Forestry | 1 |
| General | 2 |
| Geology | 1 |
| Mining | 2 |
| Nautical | 2 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 3 |
| Oil and gas | 1 |
| Oilfields | 2 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Technology | 2 |
| Transport | 1 |
| Weapons of mass destruction | 1 |