| OSIP | Operational Suitability Improvement Program (aviation) | 作战适应性改进计划（航空） |
| OSIP | Ohio Statewide Imagery Program | 俄亥俄州全州图像计划 |
| OSIP | Open Sip (session initiation protocol) | Open Sip（会话启动协议） |
| OSIP | Open Source Integrated Portfolio | 开源集成产品组合 |
| OSIP | Operational Safety Improvement Program | 操作安全改进计划 |
| OSIP | O S I Pharmaceuticals, Inc. | O S I制药公司。 |