| ACSEC | Accounting Standards Executive Committee 
| Others |
| AcSEC | Accounting Standards Executive Committee (US)
| Others |
| ACSEC | Advisory Committee on Small and Emerging Companies
| Others |
| ACSEC | Aitchison College Science and Engineering Concept
| Others |
| ACSEC | Ashley Cooper Stormwater Education Consortium
| Others |
| ACSEC | Association Culturelle et Sportive Euro Chinoise
| Others |
| ACSEC | Atlantic Canada Sustainable Energy Coalition
| Others |
| ACSEC | Avon Care Sector Employer's Consortium
| Others |