| Acronym | Definition |
|---|
| ECO➣Engineering Change Order |
| ECO➣Electronic Central Office |
| ECO➣Ecology |
| ECO➣Economics |
| ECO➣Engineering, Construction & Operations |
| ECO➣Economic Cooperation Organization |
| ECO➣Environmental Careers Organization |
| ECO➣Electronic Control (Sprint) |
| ECO➣Europe Centrale et Orientale (France: Central and Eastern Europe) |
| ECO➣Escherichia Coli |
| ECO➣Early Childhood Outcomes |
| ECO➣Engineering Change Order (various companies) |
| ECO➣Epichlorohydrin (rubber) |
| ECO➣Environmental Career Opportunities |
| ECO➣Emil Chronicle Online (role-playing game) |
| ECO➣Ethernet Connection (NEC) |
| ECO➣Earls Court and Olympia (London, England) |
| ECO➣Executive Council Office (Canada) |
| ECO➣Export Control Officer |
| ECO➣Education and Communication Officer (UK) |
| ECO➣European Cluster Observatory (regional economic information) |
| ECO➣Environmental Conservation Organization |
| ECO➣Economy Mode |
| ECO➣Enterprise Configurator |
| ECO➣Enterprise Core Objects |
| ECO➣Economy |
| ECO➣Evangelical Covenant Order (Presbyterian denomination) |
| ECO➣Early Canadiana Online (digital library) |
| ECO➣Environmental Commissioner of Ontario (Canada) |
| ECO➣Electronic Collections Online (various organizations) |
| ECO➣Execution and Control of Operations |
| ECO➣Engine Certification Office (FAA) |
| ECO➣Entry Clearance Officer (UK immigration) |
| ECO➣Environment Control Officer (Singapore) |
| ECO➣Encyclopedia of Chess Openings |
| ECO➣Enhanced Company Operations (US Marine Corps) |
| ECO➣Electronic Combat Officer (US DoD) |
| ECO➣Edison-Chouest Offshore |
| ECO➣Emergency Custody Order (mental health) |
| ECO➣Environmental and Conservation Organisations (of Aotearoa, New Zealand) |
| ECO➣Enterprise Core Object |
| ECO➣Electron-Coupled Oscillator |
| ECO➣Energy Cut Off |
| ECO➣Ecological Scenario |
| ECO➣Emergency Coordinating Officer |
| ECO➣Equity Carve-Out |
| ECO➣Entry Control Officer (UK fire service) |
| ECO➣Earth Communication Office |
| ECO➣Electronic Countermeasures Officer |
| ECO➣European Communications Office |
| ECO➣Equitable Consideration Offer (IRS) |
| ECO➣Equipment Control Officer |
| ECO➣Export Control Organization (UK) |
| ECO➣Emergency Changeover Order signal (CCS #7 & ITU-T) |
| ECO➣Entrega Comunicación Oración (Spanish: Delivery Communication Prayer) |
| ECO➣Enhanced Connectivity Options (AT&T) |
| ECO➣European Certifying Organization SpA (Italy) |
| ECO➣Economic Competitive Opportunity |
| ECO➣Electioneering Communication Organizations |
| ECO➣Emergency Control Officer |
| ECO➣End Central Office (NARTE) |
| ECO➣Environmental Citizen Organisation |
| ECO➣Embarkation Control Office |
| ECO➣Engagement Control Officer (Tomahawk) |
| ECO➣Edit Change Order |
| ECO➣Experiment in Construction with Object-Oriented Methods |
| ECO➣online Electronic Certificate of Origin (trade) |
| ECO➣Extraordinary Customer Opportunity (Sprint) |
| ECO➣Equal Competitive Opportunity (FCC) |
| ECO➣Elite Combat Operatives (gaming clan) |
| ECO➣Environmental Compliance Organization International LLC (Portland, OR) |