| IRR | interest rate risk | 利率风险 |
| IRR | internal rate of return | 内部收益率 |
| IRR | Industrial Research Rocket | 工业研究火箭 |
| IRR | Iranian Rial (ISO currency code) | 伊朗里亚尔（ISO货币代码） |
| IRR | Ionizing Radiations Regulations | 电离辐射条例 |
| IRR | Interim Research Review | 中期研究审查 |
| IRR | Ionising Radiations Regulations | 电离辐射法规 |
| IRR | Infra-red Radiometer | 红外辐射计 |
| IRR | Independent Referencing Review | 独立参考审查 |
| IRR | Institute of Resource Recovery | 资源回收研究所 |
| IRR | Implementing Rules and Regulations | 实施细则和条例 |
| IRR | Interference Reduction Ratio | 干扰减少率 |
| IRR | Internet Routing Registry | Internet路由注册表 |
| IRR | Interrupt Request Register | 中断请求寄存器 |
| IRR | Individual Ready Reserve | 第一类后备役人员 |
| IRR | Installation Readiness Report | 安装就绪报告 |
| IRR | Integrated Radio Room | 综合无线电室 |
| IRR | Information Request Response | 信息请求响应 |
| IRR | Image Rejection Ratio | 图像抑制比 |
| IRR | Irregular | 不整齐的 |
| IRR | Integral Rocket Engine | 整体式火箭发动机 |
| IRR | irritation | 生气 |
| IRR | irradiation | 放射 |
| IRR | infrared refractometry | 红外折射法 |
| IRR | irritant | 令人烦恼的事物 |
| IRR | Infra Red Resistant | 抗红外线 |
| IRR | Ionising Radiation Regulations | 电离辐射法规 |
| IRR | Institute of Restoration and Reclamation | 恢复与复垦研究所 |
| IRR | Initial Requirements Review | 初始要求审查 |
| IRR | Initial Response Resources | 初始响应资源 |
| IRR | Initial Return Rate (TL 9000) | 初始回报率（TL 9000） |
| IRR | Interface Requirements Review | 接口需求评审 |
| IRR | Integrated Resource Recovery | 集成资源恢复 |
| IRR | Independent Race and Refugee (news network; Institute of Race Relations) | 独立种族和难民（新闻网；种族关系研究所） |
| IRR | integrated readiness report (US DoD) | 综合战备报告（美国国防部） |
| IRR | Inactive Ready Reserve | 非活动就绪储备 |
| IRR | Immediate Reroute | 立即重新路由 |
| IRR | Internal Recall Recorder (Telex Vega) | 内部召回记录器（Telex Vega） |
| IRR | Infrared Reflectography | 红外反射图 |
| IRR | Investigative Records Repository | 调查记录存储库 |
| IRR | intrarenal reflux | 肾内反流 |
| IRR | Individual Retirement Record | 个别退役登记表 |
| IRR | Institute for the Recovery from Racisms | 种族主义康复研究所 |
| IRR | Inspect and Repair as Required | 根据需要进行检查和维修 |
| IRR | Iron Road Railways, Inc. | 铁路铁路公司。 |
| IRR | Intelligence Radar Reporting | 情报雷达报告 |
| IRR | Investment Return Ratio (economics) | 投资回报率（经济） |