| IEST | Lenovo International Electronic Sports Tournament | 联想国际电子竞技锦标赛 |
| IEST | Istituto Europeo per lo Sviluppo Tecnologico (Italian) | Istituto Europeo per lo Sviluppo Tecnologico（意大利语） |
| IEST | Institute of Environmental Sciences and Technology | 环境科学与技术研究所 |
| IEST | Inboard Electronics Study Team | 内部电子研究团队 |
| IEST | IWS Executive Search Team | IWS高管搜索团队 |