| RFI | Read Frequency Input | 读频输入 |
| RFI | Radio Frequency Interference | 射频接口 |
| RFI | Radio France Internationale | 法国国际广播电台 (法语缩写） |
| RFI | Road Features Inventory | 道路特征清单 |
| RFI | Rapid Fielding Initiative | 快速部署计划 |
| RFI | Rete Ferroviaria Italiana (Italian train network) | 意大利铁路网 |
| RFI | Radio Frequency Identification (usually seen as RFID) | 射频识别（通常称为RFID） |
| RFI | Rapid Fault Isolation (MCI) | 快速故障隔离（MCI） |
| RFI | Radio-France Internationale | 法国国际广播电台 |
| RFI | Representative of a Foreign Interest | 外国利益代表 |
| RFI | Radio Frequency Interferometer | 射频干涉仪 |
| RFI | Request for Installation | 安装请求 |
| RFI | Radar Frequency Interferometer (AN/APR-48A radar) | 雷达频率干涉仪(一种/ APR-48A雷达) |
| RFI | Remote File Inquiry | 远程文件查询 |
| RFI | Request For Information | 信息请求 |
| RFI | Rehabilitation Foundation, Inc. | 康复基金会。 |
| RFI | Ready For Issue | 准备发行 |
| RFI | Radio Frequency Investigation | 无线电频率调查 |
| RFI | Resource File Index | 资源文件索引 |
| RFI | Ready For Installation | 准备好安装 |
| RFI | Rescue Force International | 国际救援部队 |
| RFI | Rifle Factory India | 印度步枪厂 |
| RFI | Resources For Industry | 工业资源 |
| RFI | Router Fault Isolation | 路由器故障隔离 |
| RFI | Repetitive Frag Injury | 重复性脆性损伤 |
| RFI | Rotax Fuel Injection | Rotax燃油喷射 |
| RFI | Rapid Fielding Intiative | 快速部署指令 |
| RFI | Relative Flourescence Intensity | 相对荧光强度 |
| RFI | Radio Frequency Interface | 射频接口 |
| RFI | Resin Film Infusion | 树脂薄膜灌注 |
| RFI | Remote Fault Indication | 远程故障指示 |
| RFI | Remedial Field Investigation | 补救性现场调查 |
| RFI | Ready for Inspection | 准备好检查 |
| RFI | Requires Further Information | 需要更多信息 |
| RFI | RCRA Facility Investigation | RCRA设施调查 |
| RFI | Requirement to Furnish Information (letter sent to alleged violators of US Treasury Department laws and codes) | 提供信息的要求（发给涉嫌违反美国财政部法律和法规的人的信） |
| RFI | Receiver Fixture Interface Alliance | 接收器夹具接口联盟 |
| RFI | Cohen & Steers Total Return Realty Fund | 科恩和让总回报不动产基金 |
| RFI | Requirement for Improvement (health care) | 改进要求（卫生保健） |
| RFI | recurrence-free interval | 无复发间隔 |
| RFI | Request for Intelligence (DoD) | 情报请求（DoD） |
| RFI | Remote File Inclusion (remote internet attack technique) | 远程文件包含（远程互联网攻击技术） |
| RFI | renal failure index | 肾衰竭指数 |
| RFI | Relative Fluorescence Intensity | 相对荧光强度 |
| RFI | Room For Improvement | 有待改进的空间 |
| RFI | Request For Implementation | 实施请求 |
| RFI | Roling For Ice | 滚冰 |
| RFI | Rifle Factory Ishapore | Ishapore步枪厂 |