CIG could stand for:

• Certified Interpretive Guide [1], credentials earned by participating in a training course by the National Association for Interpretation (NAI), which leads to certification.
• Community of International Gamers[2], a New Zealand-based gaming community.
• The IEEE Symposium on Computational Intelligence and Games, an annual conference on computational intelligence research related to game applications
• NYSE: CIG, the stock symbol for Companhia Energetica de Minas Gerais S.A.
• A colloquial term for a cigarette
• The Canadian Improv Games an annual nation-wide Improvisation competition for high school students in Canada.
• Confederación Intersindical Galega (~Galician InterTrade Union Confederation) is a galician Trade union with the legal status of more representative trade union in Spain
• Columbia Insurance Group, a private US insurance company
• Corpus Inscriptionum Graecarum (Berlin, 1825-1877), the first attempt at a standard corpus of the Greek inscriptions of Antiquity.
• Commonwealth Industrial Gases Ltd, a former industrial gas company in Australia, now BOC Australia
• Computational Infrastructure for Geodynamics, an organization that develops and maintains open-source software for computational geophysics.
• IATA airport code for Craig-Moffat Airport
• Common interest group
• Center for Integrative Genomics

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