| Acronym | Definition |
|---|
| ETOP➣Extended Range Twin Engine Operation (US FAA) |
| ETOP➣Education and Training in Optics and Photonics |
| ETOP➣Environmental Technology Opportunities Portal (website; US EPA) |
| ETOP➣Environmental Threat and Opportunity (business analysis) |
| ETOP➣Employee Training Opportunity Program |
| ETOP➣Elective Termination of Pregnancy |
| ETOP➣Enhanced Training Opportunities Program (continuing vocational education) |
| ETOP➣Engineering Turnover Package |
| ETOP➣Expedited Task Order Process |