| RPI | Retail Price Index | 零售物价指数 |
| RPI | Row Per Inch | 行数/每吋 |
| RPI | Remarried Parents, Inc. | 再婚父母公司。 |
| RPI | Residue Processing Initiative | 残渣处理倡议 |
| RPI | Ridder Publications, Inc. | Ridder Publications,Inc.公司。 |
| RPI | Reticulocyte Production Index | 网织红细胞生成指数 |
| RPI | Real Polytechnic Institute | 皇家理工学院 |
| RPI | Regional Perfusion Index | 区域灌注指数 |
| RPI | Requested Packet Interval | 请求的数据包间隔 |
| RPI | Rensselaer Polytechnic Institute (Troy, NY, USA) | 伦斯勒理工学院(美国纽约州特洛伊) |
| RPI | Railway Progress Institute | 铁路进步研究所 |
| RPI | Richmond Professional Institute (Virginia) | 里士满职业学院(弗吉尼亚) |
| RPI | Responsive Production Inventory | 响应式生产库存 |
| RPI | Real Property Inventory | 不动产库存 |
| RPI | Research Planning, Inc. | 研究规划公司。 |
| RPI | Relay Position Indicator | 继电器位置指示器 |
| RPI | Runs Per Inning (baseball) | 每次跑步(棒球) |
| RPI | Rockwell Protocol Interface (modems) | 罗克韦尔协议接口(调制解调器) |
| RPI | Roll Position Indicator | 滚动位置指示器 |
| RPI | Retinitis Pigmentosa International | 国际色素性视网膜炎 |
| RPI | Ratings Percentage Index | 评级百分比指数 |
| RPI | Rebounds Per Inning | 每次住宿的反弹数 |
| RPI | Request Progression Interface | 请求进度界面 |
| RPI | Rockwell Protocol Interface | 罗克韦尔协议接口 |
| RPI | Ratings Performance Index | 评级绩效指数 |
| RPI | Rick Pitino Inflated | Rick Pitino充气 |
| RPI | Role Playing Intensive | 强化角色扮演 |
| RPI | Rural Property Investments | 农村房地产投资 |
| RPI | Ratings Power Index | 额定功率指数 |
| RPI | Rockwell Proprietary Interface | 罗克韦尔专有接口 |
| RPI | Resort Parks International | 国际公园度假酒店 |
| RPI | Rowdy Puz Institution | 罗迪·普兹学院 |
| RPI | Retarded People's Institute | 智障人的学院 |
| RPI | Ranking Percentage Index (sports statistic) | 排名百分比指数(体育统计) |
| RPI | relative proliferation index | 相对增殖指数 |
| RPI | Rated Position Identifier | 额定位置标识符 |
| RPI | right pulsatility index | 右搏动指数 |
| RPI | Ratings Percentage Index (college basketball) | 评分百分比指数(大学篮球) |
| RPI | respiration/pulse index | 呼吸脉搏比,呼吸/脉搏指数 |
| RPI | Radar Precipitation Integrator | 雷达降水积分器 |
| RPI | Republican Initiative | 共和党倡议 |
| RPI | Recruiting Publicity Item (US Army) | 招募宣传项目(美国陆军) |
| RPI | Rose Polytechnic Institute (Indiana) | 罗斯理工学院(印第安纳州) |
| RPI | Response Posture Immediate | 立即响应姿势 |
| RPI | Red Planet Interactive Games | 红色星球互动游戏 |
| RPI | Related Proteins of the Immune System | 免疫系统相关蛋白 |
| RPI | Revista da Propriedade Industrial (Official Gazette of the Brazilian Patent and Trademark Office; Brazil) | Revista da Propriedade Industrial(巴西专利和商标局官方公报;巴西) |
| RPI | Rapid Process Improvement | 快速流程改进 |
| RPI | Residual Plan of Instruction | 剩余指导计划 |
| RPI | Request for Problem Investigation | 问题调查请求 |
| RPI | Runway Point of Intercept | 跑道拦截点 |
| RPI | Races Per Incident (racing) | 每次事件的比赛次数(比赛) |
| RPI | Rensselaer Polytechnic Institute | 伦斯勒理工学院 |