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| help system (ssn) | |||
| система справочной информации: 19 phrases in 12 subjects |
| Astronautics | 1 |
| Computers | 1 |
| Ecology | 5 |
| Information technology | 1 |
| Mass media | 1 |
| Medical | 1 |
| Military | 3 |
| Oil / petroleum | 1 |
| Quality control and standards | 2 |
| Telecommunications | 1 |
| United Nations | 1 |
| Water supply | 1 |