| Acronym | Definition |
|---|
| ACEC | American Council of Engineering Companies (formerly American Consulting Engineers Council) |
| ACEC | Advisory Committee on Electromagnetic Compatibility |
| ACEC | American Consulting Engineers Council (now American Council of Engineering Companies) |
| ACEC | Areas of Critical Environmental Concern |
| ACEC | Association of Corporate Executive Coaches |
| ACEC | Association of Consulting Engineers of Canada |
| ACEC | Adams Columbia Electric Cooperative (Wisconsin) |
| ACEC | Advisory Commission on Electronic Commerce |
| ACEC | Associazione Cattolica Esercenti Cinema |
| ACEC | Association of Canadian Editorial Cartoonists (est. 1988) |
| ACEC | Advisory Committee on Electromagnetic Compatibility (International Electrotechnical Commission; Switzerland) |
| ACEC | Army Communications Electronics Command (now CECOM) |
| ACEC | Australian Council of Education Centres |
| ACEC | Ada Compiler Evaluation Capability |
| ACEC | Armenian Cultural and Educational Center (Watertown, Massachusetts) |
| ACEC | Acute Critical Effluent Concentration |
| ACEC | Association Canadienne d'études Cinématographiques (Film Studies Association of Canada) |
| ACEC | Association Canadienne d'études Cinématographiques |
| ACEC | Assessment Component of Employment Counselling |
| ACEC | Alcona County Environmental Coalition (Alcona County, MI) |
| ACEC | Association Chouala pour l'Education et Culture (Morocco) |