| Acronym | Definition |
|---|
| ETI | Ethical Trading Initiative (UK) |
| ETI | Ente Teatrale Italiano (Italy) |
| ETI | Extraterritorial Income |
| ETI | Extraterrestrial Intelligence |
| ETI | Ecole de Traduction et d’Interprétation (French: School of Translation and Interpretation, University of Geneva, Switzerland) |
| ETI | Expert Center for Taxonomic Identification |
| ETI | Economically Targeted Investment |
| ETI | Employment Trends Index (The Conference Board) |
| ETI | Evolutionary Technologies International, Inc. |
| ETI | Ensemble Transport Interface |
| ETI | Emergent Technologies Inc (Austin, TX) |
| ETI | Environmental Technology Initiative |
| ETI | Elapsed Time Indicator |
| ETI | Estimated Time to Invasion (game) |
| ETI | Electrical Training Institute (of Southern California) |
| ETI | Efficient Technology Inc (Redondo Beach, CA) |
| ETI | Equator Technologies, Inc. |
| ETI | Enterprise Theory of Investigation (RICO statute) |
| ETI | Enhanced Training in Idaho |
| ETI | Economical and Technological Intelligence (5th European Framework Programme) |
| ETI | Economic Trends and Issues |
| ETI | estimated time of intercept (US DoD) |
| ETI | Elektronika Telekomunikacja Informatyka (Polish: Electronics Telecommunications Informatics) |
| ETI | Evolutionary Technology Insertion (military) |
| ETI | Energy Time Indicator |
| ETI | Economics & Technology Incorporated |
| ETI | Estudiants de Traducció i Interpretació (Translation & Interpreting Students; Students Union) |
| ETI | Eagle Technologies Incorporated |
| ETI | Electro-Therm International (Belgium) |
| ETI | Enterprise Telephone Integration (CMA) |
| ETI | Enterprise Transition & Implementation |
| ETI | Extended Transaction Interface |
| ETI | East Texas Inspections (Grand Saline, TX real estate) |