| Acronym | Definition |
|---|
| ERO➣Enforcement and Removal Operations (US DHS) |
| ERO➣Education Review Office (New Zealand) |
| ERO➣European Radiocommunications Office |
| ERO➣Electoral Registration Officer |
| ERO➣Énergies Renouvelables de l'Ouest (French: Western Renewable Energy) |
| ERO➣Emergency Restraining Order |
| ERO➣Emergency Response Organization |
| ERO➣Electric Reliability Organization |
| ERO➣Electronic Return Originator (US Internal Revenue Service) |
| ERO➣Explicit Route Object (protocol) |
| ERO➣Eastern Regional Office |
| ERO➣Emergency Response Officer |
| ERO➣Encarta Research Organizer |
| ERO➣Encapsulated Realtime Objects |
| ERO➣Employee Relations Officer |
| ERO➣Entreprise de Récupération Ouest (French: Corporate Recovery West; Algeria) |
| ERO➣Early Retirement Option |
| ERO➣Engineered Refueling Overhaul (US Navy) |
| ERO➣European Risk Observatory (European Agency for Safety and Health at Work) |
| ERO➣Enterprise Resource Optimization |
| ERO➣Endoplasmic Reticulum Oxidoreductase (proteins) |
| ERO➣European Research Office |
| ERO➣Equal Rights Office |
| ERO➣Edge Roll-Off (silicon wafer geometry) |
| ERO➣Equipment Repair Order (USMC) |
| ERO➣Early Release Observation |
| ERO➣Export Regulations Office (IBM Corp.) |
| ERO➣Event-Related Oscillations |
| ERO➣Emergency Repair Overseer (US Navy) |
| ERO➣Eightball Run Out (billiards) |
| ERO➣European-American Rights Organization (pro-white group) |
| ERO➣Exponential Rate Optimal (test) |
| ERO➣Eastern Rehabilitation Organization (Sri Lanka) |
| ERO➣Electronics Readiness Officer |
| ERO➣Earned Run Out (Pool; break and run table) |
| ERO➣European Racing Organisation |
| ERO➣Engines Running On-Load/Off-Load |
| ERO➣Errored input from other systems queue |