| Rank | Abbreviation | Meaning |
|---|
| ***** | EMSI | Emergency Medical Service Institute
| |
| ***** | EMSI | Effective Management Systems Inc
| |
| ***** | EMSI | Environmental Management Systems Inc
| |
| **** | EMSI | École Marocaine des Sciences de l'Ingénieur
| |
| **** | EMSI | Executive Management Services, Inc.
| |
| **** | EMSI | Electronic Manufacturing Services Industry
| |
| **** | EMSI | Electro-Mechanical Systems International
| |
| *** | EMSI | Electrostim Medical Services Inc
| |
| *** | EMSI | Environmental Management for Sustainability Inc
| |
| *** | EMSI | Ecole de Management des Systèmes d'Information
| |
| *** | EMSI | Emergency Medical Services Instructor
| |
| *** | EMSI | Environmental Management Services Inc
| |
| *** | EMSI | Etudes de Mécanique Sismique
| |
| *** | EMSI | Early Modern Studies Institute
| |
| ** | EMSI | Executive Management Solutions Inc
| |
| ** | EMSI | Examination Management Services Inc
| |
| ** | EMSI | Enbridge Management Services Inc
| |
| ** | EMSI | Environmental Mutagen Society of India
| |
| ** | EMSI | Engineering Management Support Inc
| |
| * | EMSI | EnviroClean Management Services Inc
| |
| * | EMSI | Event Management Services Incorporated
| |
| * | EMSI | Electronic Mail Standard Identification
| |
| * | EMSI | Early Music Society of the Islands
| |
| * | EMSI | Ellipsomicroscopy for Surface Imaging
| |
| * | EMSI | Elektronic Mail Standard Identification
| |