| Acronym | Definition |
|---|
| EOI | Expression Of Interest |
| EOI | Effect of Interest |
| EOI | Exchange of Information |
| EOI | Evidence Of Insurance |
| EOI | Embassy of India |
| EOI | Evidence of Insurability |
| EOI | Escuela Oficial de Idiomas (Spain, Official Languages School) |
| EOI | End of Injection |
| EOI | Economic Opportunity Institute |
| EOI | Evidence of Identity |
| EOI | Expressions of Interest |
| EOI | Explanation of Investment |
| EOI | End of Image |
| EOI | Edge of Insanity |
| EOI | End of Innocence (music album) |
| EOI | End of Interrupt |
| EOI | Escuela de Organización Industrial (Spain) |
| EOI | End of Irradiation |
| EOI | Evidence of Identity (various nations) |
| EOI | Export Oriented Industrialisation |
| EOI | Engine of Innovation |
| EOI | Electronic Operator Interface |
| EOI | Every Other Issue |
| EOI | End of Input |
| EOI | End Or Identify |
| EOI | End of Instruction (type of exam) |
| EOI | Export Oriented Industry |
| EOI | Electronic Object Identifier |
| EOI | Extra Ordinary Income |
| EOI | Electro-Optical Interface (Nortel) |
| EOI | Emergency Operating Instruction(s) |
| EOI | European Ombudsman Institute |
| EOI | Equivalence of Input (telecommunications regulation) |
| EOI | Economic Opportunity Initiative (various organizations) |
| EOI | Earth Orbit Insertion |
| EOI | Elf Only Inn (webcomic) |
| EOI | End of Identity |
| EOI | End Of Installation (US Navy) |
| EOI | End of Item |
| EOI | Electronic Order Interface |
| EOI | Early Operational Interface |
| EOI | Executive Office Installation |
| EOI | Engineering Operating Instruction |
| EOI | Effective Operating Income |
| EOI | Early Oral Intervention (Mississippi) |