IEST
| Acronym | Definition |
|---|---|
| IEST | Institute of Environmental Sciences and Technology |
| IEST | Immunoenzymatic Staining Technique |
| IEST | International Electronic Sports Tournament (Lenovo; China) |
| IEST | Integrative Energy and Spiritual Therapy (psychotherapy) |
| IEST | Inboard Electronics Study Team |
| IEST | Istituto Europeo per lo Sviluppo Tecnologico (Italian) |