 |
| ladders: 110 phrases in 22 subjects |
| Agriculture | 6 |
| Botany | 1 |
| Chemistry | 3 |
| Communications | 1 |
| Construction | 3 |
| Cultural studies | 1 |
| Electronics | 3 |
| Environment | 1 |
| Finances | 1 |
| Fish farming pisciculture | 3 |
| General | 11 |
| Hobbies and pastimes | 1 |
| Immigration and citizenship | 1 |
| Industry | 3 |
| Information technology | 2 |
| Materials science | 27 |
| Mechanic engineering | 5 |
| Medical | 1 |
| Social science | 7 |
| Statistics | 2 |
| Technology | 3 |
| Transport | 24 |