| IGI | International Gaming Institute (University of Nevada, Las Vegas, NV) | 国际博彩协会(内华达大学,内华达州拉斯维加斯) |
| IGI | International Genealogical Index | 国际家谱索引 |
| IGI | Indian Institute of Geomorphology | 印度地貌研究所 |
| IGI | Institution Gang Investigator (prisons) | 机构帮派调查员(监狱) |
| IGI | Investigation Group International, Inc. (Washington, DC) | 国际调查组(华盛顿特区) |
| IGI | I'm Going In | 我要进去 |
| IGI | Institute of Geologists of Ireland | 爱尔兰地质学家学会 |
| IGI | I Get It | 我明白了 |
| IGI | Inspector General for Investigations | 调查总监 |
| IGI | International Gemological Institute | 国际宝石学院 |
| IGI | Inner Grid Injection | 内部栅格注入 |
| IGI | Initial Gap Increasing Method | 初始间隙增大方法 |
| IGI | Institute For Geotactical Intelligence | 地理战术情报研究所 |
| IGI | I'm Going Insane | 我要发疯了 |