ACEC may refer to:
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Advisory Committee on Electromagnetic Compatibility, a branch of the International Electrotechnical Commission
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American Council of Engineering Companies, a representative of America's engineering industry
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Area of Critical Environmental Concern
Areas of Critical Environmental Concern (ACEC) is a conservation ecology program in the Western United States, managed by the Bureau of Land Management (BLM). The ACEC program was conceived in the 1976 Federal Lands Policy and Management Act (F ...
, a program managed by the Bureau of Land Management
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Area of Critical Environmental Concern (Massachusetts), a state level land protection program in Massachusetts
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Australian Computers in Education Conference, a conference held by the Australian Council for Computers in Education every two years
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SA Ateliers de Constructions Electriques de Charleroi, Belgian electrical engineering company founded in 1904, defunct 1989
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