| Anglais |
| orthogonal | |
| chim. | rectangular; right-angled |
| math. | orthogonal |
|
system : 50 phrases, 13 sujets |
| Agriculture | 3 |
| Chimie | 1 |
| Cinématographie | 1 |
| Communications | 9 |
| Environnement | 1 |
| Finances | 1 |
| Général | 6 |
| Industrie textile | 1 |
| Informatique | 4 |
| Microsoft | 10 |
| Nations unies | 1 |
| Ordinateurs | 1 |
| Transport | 11 |