| SEC | Securities Exchange Commission | - | Chatting Acronyms |
| SEC | Size Exclusion Chromatography | - | Computer Acronyms(common) |
| SEC | Scaled External Correlation (extrapolation Method In CI Calcn.) | - | Computer Acronyms(common) |
| SEC | Sulfite Evaporator Condensate | - | Computer Acronyms(common) |
| SEC | Second | - | Organizations |
| SEC | Secondary | - | Organizations |
| SEC | Secondary | - | Organizations |
| SEC | Sequential Events Controller | - | Organizations |
| SEC | Source Evaluation Committee | - | Organizations |
| SEC | Wait A Second | - | ISO Country Codes |
| SEC | U.S. Securities And Exchange Commission -Security - Southeastern Conference | - | Astronomy |
| SEC | Securities & Exchange Commission | - | Business and Finance |
| SEC | Science Executive Committee | - | Business and Finance |
