Operating
| System
| Operating | |
| el. abbr. | O |
| operating | |
| abbr. qual.cont. | oper. |
| 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 |
| |||
| oper. | |||
| op | |||
| |||
| O | |||
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Operating : 16 phrases in 7 subjects |
| Abbreviation | 1 |
| Aviation | 7 |
| Electronics | 1 |
| Information technology | 1 |
| Military | 4 |
| Photography | 1 |
| Transport | 1 |