| ROIF | Research-Oriented Investment Fund | 研究型投资基金 |
| ROIF | Research Oriented Investment Fund | 研究型投资基金 |
| ROIF | Reduced Order Information Filter | 降阶信息过滤器 |
| ROIF | Right Outer Inner Forward | 右外侧内侧向前 |
| ROIF | Reverse Obliquity Inter-trochanteric Fracture | 转子间反向倾斜骨折 |
| ROIF | Release Of Information Form | 信息发布表 |
| ROIF | Red Oak Industrial Foundation | 红橡树工业基金会 |