| DIAC | Defense Industry Advisory Council | 国防工业咨询委员会(美) |
| DIAC | Devoted Inquiry Access Code | 专用查询识别码 |
| DIAC | di-iodothyro-acetic aicd | 乙酸二碘甲状腺 |
| DIAC | Diapulse Corporation of America | 美国Diapulse公司 |
| DIAC | Defense Intelligence Analysis Center | 国防情报分析中心 |
| DIAC | Department of Immigration and Citizenship (Australia) | 移民和公民部（澳大利亚） |
| DIAC | Data Interpretation Analysis Center | 数据解释分析中心 |
| DIAC | Dedicated Inquiry Access Code (Bluetooth) | 专用查询访问码（蓝牙） |
| DIAC | Durham Integrated Arts Camp | 达勒姆综合艺术营 |