| ESAC | Airship Rigger Chief Petty Officer 
| Others |
| ESAC | Earth Sciences Advisory Committee
| Others |
| ESAC | East Shore Athletic Club
| Others |
| ESAC | Eastern Seaboard Apprenticeship Conference
| Others |
| ESAC | Eastern Seaboard Athletics Conference
| Others |
| ESAC | Eastern Shore Art Center
| Others |
| ESAC | Eastern Sierra Avalanche Center
| Others |
| ESAC | Ecumenical Social Action Committee
| Others |
| ESAC | Efficiency and Standards for Article Charges
| Others |
| ESAC | Egon Schiele Art Centrum
| Others |
| ESAC | Electronic Shock Absorber Control
| Others |
| ESAC | Electronic Spark Advance Control
| Others |
| ESAC | Electronic Surveillance Assistance Center
| Others |
| ESAC | Electronic Suspension Air Control
| Others |
| ESAC | Electronic Systems Assistance Center
| Others |
| ESAC | Elite Sim Avaitor Corps
| Others |
| ESAC | Emergency Shelter Assessment Committee
| Others |
| ESAC | Emergency Surgery Ambulatory Clinic
| Others |
| ESAC | Employer Services Assurance Corporation
| Others |
| ESAC | Energy Systems Analysis Consortium
| Others |
| ESAC | Engineering Staff Advisory Council
| Others |
| ESAC | Engineering Student Activities Council
| Others |
| ESAC | Engineering Students Academic Committee
| Others |
| ESAC | Enterprise Science and Computing
| Others |
| ESAC | Entertainment Software Association of Canada
| Others |
| ESAC | Environmental Science Analytical Center
| Others |
| ESAC | Environmental Sciences Analytical Center
| Others |
| ESAC | Environmental Services Advisory Committee
| Others |
| ESAC | Environmental Stewardship Advisory Committee
| Others |
| ESAC | Environmental Stewardship Advisory Committee's
| Others |
| ESAC | Environmental Studies Association of Canada
| Others |
| ESAC | European Space Astronomy Center
| Others |
| ESAC | European Space Astronomy Centre
| Others |
| ESAC | European Study Abroad Center
| Others |
| ESAC | European Surveillance of Antimicrobial Consumption
| Others |
| ESAC | European Surveillance on Antimicrobial Consumption (of DG SANCO of the European Commission)
| Others |
| ESAC | Exchange and Study Abroad Club
| Others |
| ESAC | Extra Structurally Abnormal Chromosome
| Others |