Operations Support
| Systems
| Operations & Support | |
| mil. abbr. | O&S |
| SYSTEM | |
| abbr. | Saves You Serious Time Energy And Money |
| abbr. el. | systematic interaction model |
| abbr. mil., WMD | system |
| system | |
| abbr. | syst; syst. |
| abbr. AI. | SI system |
| abbr. auto. | aided manufacturing system; gasoline injection system |
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| O&S | |||
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Operations : 16 phrases in 9 subjects |
| Abbreviation | 5 |
| Business | 1 |
| Education | 1 |
| Information technology | 1 |
| Military | 4 |
| Politics | 1 |
| Telecommunications | 1 |
| Transport | 1 |
| United States | 1 |