| Acronym | Definition |
|---|
| ASEC | Aviation Systems Engineering Company (Lexington Park, MD) |
| ASEC | American Savings Education Council |
| ASEC | Authorized Sun Education Center (Sun Microsystems) |
| ASEC | American Studies Electronic Crossroads (American Studies Association) |
| ASEC | Australian Software Engineering Conference |
| ASEC | Avenger Sebring Enthusiasts Club (car club) |
| ASEC | Ateneo Student Exchange Council (Ateneo de Manila University; Philippines) |
| ASEC | Agrupacion Secundaria de Estudiantes Cristianos (Spanish: Agrupacion Christian High School Students) |