CSG may refer to: Companies CSG International, an American company providing business support systems and services CSG Limited an Australian ICT company Canada Systems Group, data processing service bureaus Commodore Semiconductor Group, formerly MOS Technology Commuter Security Group, Solna, Sweden China Shipping Group, Chinese shipping conglomerate Czechoslovak Group, a Czech holding company in aviation, railway, defense industry. Military Conseil supérieur de la guerre, French military organization Carrier strike group, an operational formation of the US Navy Corps Support Group, a brigade-sized unit in the United States Army Organizations Camden School for Girls, in London, England Columbus School for Girls, in Ohio, United States Canadian Senators Group, a parliamentary group Centrum Schwule Geschichte (Gay History Center), Cologne, Germany Citizens for Self-Governance, a US political organization Common Sense Group, a UK political organisation The Council of State Governments, a United States non-profit organization Science and technology Coal seam gas, from coal beds Constructive solid geometry, a technique used in solid modeling Constructible strategy game, type of tabletop strategy game Context-sensitive grammar, a formal grammar Crystalline silicon on glass, see Polycrystalline silicon photovoltaics#Novel ideas for polycrystalline silicon Haeco-CSG, an obsolete audio signal processing technology Other uses csg, the ISO 639 code for the Chilean Sign Language Centre Spatial Guyanais (Guiana Space Centre), near Kourou, rocket launch site Columbus Metropolitan Airport (Georgia), US, IATA code Deji Olatunji, an English video game commentator and comedian on YouTube known as Comedy Shorts Gamer Commonwealth Secretary-General