| |||
| signal D'B | |||
|
D'B : 11 phrases in 9 subjects |
| Aviation | 1 |
| Chemistry | 1 |
| Communications | 1 |
| Environment | 1 |
| Forestry | 2 |
| General | 1 |
| Information technology | 1 |
| Marketing | 1 |
| Medical | 2 |
| |||
| signal D'B | |||
|
D'B : 11 phrases in 9 subjects |
| Aviation | 1 |
| Chemistry | 1 |
| Communications | 1 |
| Environment | 1 |
| Forestry | 2 |
| General | 1 |
| Information technology | 1 |
| Marketing | 1 |
| Medical | 2 |