| Acronym | Definition |
|---|
| ESSI➣Education Statistics Services Institute |
| ESSI➣Étudiants en Santé pour Une Solidarité Internationale (French: Student Health for International Solidarity) |
| ESSI➣Ecole Supérieure en Sciences Informatiques (French) |
| ESSI➣Engineered Support Systems Inc. |
| ESSI➣Earth Search Sciences Inc |
| ESSI➣European Systems and Software Initiative |
| ESSI➣European Semantic Systems Initiative |
| ESSI➣European Software and Systems Initiative |
| ESSI➣Eon Silicon Solution Inc |
| ESSI➣Eco Soil Systems Inc. |
| ESSI➣European Strategic Safety Initiative (aviation safety partnership) |
| ESSI➣Enhanced Synchronous Serial Interface |
| ESSI➣Executive Security Services International (Canada) |
| ESSI➣Ethics Sustainability and Social Impact |
| ESSI➣Entrepreneurial Style & Success Indicator |
| ESSI➣Environmental and Social Sustainability Initiative |
| ESSI➣Education, Socialisation, Subjectivation, Institution |
| ESSI➣Economic Software Systems International |
| ESSI➣Enterprise System Solutions Inc. |
| ESSI➣Electronic Security Services, Inc. (est. 1981) |
| ESSI➣Envisat and Sea Ice (Conditions in the Baltic Sea) |
| ESSI➣Enhanced Special Structural Inspection (aviation) |
| ESSI➣Electrospec Sales Inc. |
| ESSI➣Estonian-Swedish Suicidology Institute |
| ESSI➣Education Service for the Sensory Impaired (UK) |
| ESSI➣Extreme Sports Supply International |
| ESSI➣Ergonomic & Safety Services Inc (Massachusetts) |
| ESSI➣Envirosystems Supply, Inc |
| ESSI➣Entrepreneurial Spirit and Service Through Innovation (San Francisco, CA) |
| ESSI➣Electronic System Services Incorporated |