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| système de code | |||
| système de codage | |||
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| système de codage | |||
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code system : 43 phrases in 13 subjects |
| Automated equipment | 5 |
| Aviation | 5 |
| Commerce | 1 |
| Communications | 15 |
| Computers | 1 |
| Economics | 1 |
| Electronics | 1 |
| Finances | 3 |
| General | 5 |
| Information technology | 3 |
| International trade | 1 |
| Taxes | 1 |
| Telecommunications | 1 |