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| English thesaurus | |||
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| PDS | |||
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| PDF; PDS (Air Force 2025 concept) | |||
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Planetary : 52 phrases in 14 subjects |
| Archiving | 1 |
| Astronautics | 13 |
| Astronomy | 2 |
| Automobiles | 1 |
| Aviation | 19 |
| Construction | 1 |
| Electronics | 1 |
| General | 3 |
| Mechanic engineering | 1 |
| Microelectronics | 1 |
| Military | 2 |
| Oil and gas | 3 |
| Physics | 2 |
| Technology | 2 |