| English thesaurus | |||
| |||
| PPC (iwona) | |||
|
Perceived : 55 phrases in 11 subjects |
| Communications | 3 |
| Earth sciences | 24 |
| Electronics | 3 |
| Environment | 3 |
| General | 2 |
| Health care | 5 |
| Medical | 3 |
| Natural resourses and wildlife conservation | 1 |
| Patents | 1 |
| Transport | 7 |
| United Nations | 3 |