| IRAC | Irregular Repeat-Accumulate Code | 不规则重复累计代码 |
| IRAC | Integrated Resilient Aircraft Control (NASA project) | 综合弹性飞机控制（NASA项目） |
| IRAC | International Radio Advisory Council | 国际无线电咨询委员会 |
| IRAC | International Radio Advisory Committee | 国际无线电咨询委员会 |
| IRAC | Intelligence Resource Advisory Committee | 情报资源咨询委员会 |
| IRAC | Institut Royal de l'Afrique Centrale (French) | Institut 'Afrique皇家de fixation Centrale(法国) |
| IRAC | Infrared Area Correlator | 红外区域相关器 |
| IRAC | Interim Rapid Action Change | 快速行动临时修改 |
| IRAC | Issue, Rule, Application, Conclusion (legal writing) | 问题、规则、应用、结论（法律写作） |
| IRAC | International Requirements and Criteria | 国际要求和标准 |
| IRAC | Infrared Array Camera | 红外阵列相机 |
| IRAC | Internal Retrieval Associative Computer (Wonder Woman TV series) | 内部检索关联计算机（神奇女侠电视剧） |
| IRAC | Indochina Refugee Action Center | 中印难民行动中心 |
| IRAC | Internal Review & Audit Compliance | 内部评估及审计遵守 |
| IRAC | Interim Regional Administrative Conference | 临时区域行政会议 |
| IRAC | Issue Rule Analysis And Conclusion | 问题规则分析和结论 |
| IRAC | Interdepartment Radio Advisory Committee | 部门间无线电咨询委员会 |
| IRAC | Issue Rule Application And Conclusion | 发布规则应用和结论 |
| IRAC | Institut Royal de l'Afrique Centrale | Institut 'Afrique皇家de fixation Centrale |