EAC may mean:
Organizations in North America:
- Eastern Arizona College
- Eastern Athletic Conference, a high school sports conference in Massachusetts
- Editors' Association of Canada
- Election Assistance Commission U.S.
- Electronic Arts Canada
- Energy Action Coalition
- Engineering Accreditation Commission along with ABET, bodies that oversee the validity in engineering and technology educational programs
Organisations in Europe:
- European Asylum Curriculum, an EU project in the field of asylum
- Electricity Authority of Cyprus
- East Asiatic Company, a Danish company also known as Østasiatisk Kompagni (ØK)
- Euro-Atlantic Centre, a Slovak NGO in the field of foreign and security policies
- European Advisory Commission, a commission arranged at the 1943 Moscow Conference between the Allies of World War II
- European Air Charter, a charter airline based in Bournemouth
- European Astronaut Centre, a training site of the European Space Agency in Cologne, Germany
- European Astronaut Corps
- European Accreditation Council
- European Arboricultural Council
- Earth Aerospace Corporation
Other organisations:
- East African Community, an East African trading bloc
- East Asian Community
- Emilio Aguinaldo College, a school in Manila, Philippines
- Eastern Air Command, Indian Air Force
- Electricity Authority of Cambodia
- Everyone's a Critic, a film community website
Electronics and computing:
- East Asia Crossing, a submarine telecommunications cable system
- Enhanced Audio Codec
- EasyAntiCheat, an anti-cheat client used for several steam-based computer games
- Exact Audio Copy, a popular CD ripping software package
- Encoded Archival Context, an XML-based standard
- Extended Access Control, a security feature for e-passports
Other:
- East Australian Current, a major Australian ocean current
- Eastern Agricultural Complex, indigenous plants cultivated in the precontact Southeastern United States
- Equivalent Annual Cost, a project management concept
- Estimation at Completion, a project management metric
- Erythema Annulare Centrifugum, a skin lesion consisting of redness in a ring form
- External Auditory Canal, the external canal of the ear that leads to the tympanic membrane, or ear drum
- Echelon above corps, any army formation larger than an army corps
- Exhibitor Approved Contractor, Someone hired outside of a service contractor to provide a service