| Acronym | Definition |
|---|
| CIG | Ceiling (height above ground level to base of clouds) |
| CIG | Complete Idiot's Guide |
| CIG | Cassa Integrazione Guadagni (Italian: Wages Guarantee Fund) |
| CIG | Centre Interdépartemental de Gestion |
| CIG | Conservation Innovation Grants (USDA NRCS) |
| CIG | Cancer Information Group (Dallas, TX) |
| CIG | Conference Intergouvernementale (French: Intergovermental Conference) |
| CIG | Colorado Interstate Gas (Colorado Springs, CO) |
| CIG | Comitato Italiano Gas |
| CIG | Computational Intelligence and Games (IEEE symposium) |
| CIG | Climate Impacts Group |
| CIG | Canadian Institute of Geomatics (Ottawa, ON, Canada) |
| CIG | Capital Insurance Group |
| CIG | Canadian Immunization Guide |
| CIG | Cambridge Information Group (Bethesda, MA) |
| CIG | Ceiling Height (METAR code) |
| CIG | Central Intelligence Group |
| CIG | Common Interest Group (various organizations) |
| CIG | Cultural Institutions Group (New York, NY) |
| CIG | Corpus Inscriptionum Graecarum |
| CIG | Computational Infrastructure for Geodynamics |
| CIG | Certified Interpretive Guide |
| CIG | Columbia Insurance Group |
| CIG | Canadian Improv Games |
| CIG | City Information Group (UK) |
| CIG | Center for Integrative Genomics |
| CIG | Computer Image Generation |
| CIG | Computer Image Generator |
| CIG | Cámara de Industria de Guatemala |
| CIG | Climate Impact Group |
| CIG | Community Involvement Group |
| CIG | Computer Intelligence Group, Inc. |
| CIG | Carrabba's Italian Grill (restaurant; various locations) |
| CIG | Communauté Israélite de Genève |
| CIG | Canadian Institute in Greece |
| CIG | Central Indiana Grotto |
| CIG | Council of Islamic Guidance (Pickering, ON, Canada) |
| CIG | Cheon Il Guk (Korean: Heavenly Kingdom On Earth) |
| CIG | Commonwealth Industrial Gases Ltd (Australia) |
| CIG | Current Intelligence Group |
| CIG | Centre Intercommunal de Gérontologie (French: Intercommunity Center for Gerontology) |
| CIG | Cryptobranchid Interest Group |
| CIG | Commercial Insulating Glass (various locations) |
| CIG | Centre for Integrated Genomics (British Columbia, Canada) |
| CIG | Conference Interpreters Group (UK) |
| CIG | Cable Integrity Group (NASA) |
| CIG | Cable Integrity Group |
| CIG | communications interface group (US DoD) |
| CIG | Capricorn Investment Group |
| CIG | Cell Interconnection Gateway |
| CIG | Customer Information Guide |
| CIG | Calling Subscriber Identification Group |
| CIG | Center on Institutions and Governance (UC Berkeley's Institute of Governmental Studies) |
| CIG | Center for Integrated Genomics (Cancer Research Center; University of British Columbia) |
| CIG | Cowan Insurance Group |
| CIG | Center for Intellectually Gifted |
| CIG | Cytokine Interest Group (US NIH) |
| CIG | Customer Interface Group |
| CIG | Canadian Institute of Gemology |
| CIG | Compendium Insurance Group (Pty) Ltd. |
| CIG | Customs Information Guide |
| CIG | Caspian Oil and Gas Limited |
| CIG | Conferencia Intersindical Galega |
| CIG | Chief Instructor in Gunnery (Canadian military) |
| CIG | Control Indicator Group |
| CIG | Community of International Gamers |
| CIG | Centre d'Ingénierie Générale (French: General Engineering Center) |
| CIG | Cannon Image Gateway |
| CIG | Corporate Image Group LLC |
| CIG | Cross Industry Group (various locations) |
| CIG | Communications Infrastructure Group, LLC (Brookfield, CT) |