LAC

• La Crescenta, California, unincorporated area in Los Angeles County
• Latin America and the Caribbean
• Latin American and Caribbean Group, United Nations geoscheme region
• Line of Actual Control, a demarcation line between Indian-controlled and Chinese-controlled territories (1959–present)
• Los Angeles County in California
• Los Angeles, California

• Liberal arts college, undergraduate educational institution
• Longburn Adventist College, a Seventh-day Adventist school near Palmerston North, in Longburn, New Zealand

• California State Prison, Los Angeles County
• Leading Aircraftman, a rank in some air forces

• LAC Group, library services vendor in America
• LAC Minerals, a Canadian mining company
• Ladies' Alpine Club (1907–1975), a club for women climbers, based in London, merged in 1975 with the Alpine Club
• Lake Avenue Church, Pasadena Ca.
• Lancashire Aero Club, flying club in the United Kingdom
• Legal Aid Commission, organisation providing legal aid related to Community legal centres, Australia
• Library and Archives Canada, national memory institution preserving documentary heritage about Canadian life
• Liga Antituberculosa Colombiana, an organization focused on curing and preventing tuberculosis

• L2TP Access Concentrator, endpoint of a Layer 2 Tunneling Protocol tunnel
• Laboratoire Aimé-Cotton, French research laboratory
• Linear acetylenic carbon, a polymeric carbon chain
• Location area code, a unique 16-digit fixed length location area identity code broadcast by a "base transceiver station" in GSM public land mobile network, that identifies a phone number's location area
• Lorenz asymmetry coefficient, a statistic used in the analysis of wealth or income inequality
• lac operon, a DNA operon relating to the metabolism of lactose found in some bacteria

• London Aquatics Centre
• Los Angeles Chargers, a National Football League team based in Inglewood, California
• Los Angeles Clippers, a National Basketball Association team based in Inglewood, California
• London Athletic Club, oldest independent athletic club in the world

• LAC, the ICAO operator designator for Lockheed Corporation (Lockheed Aircraft Corporation), United States
• Lignes Aériennes Congolaises (defunct airline of the Democratic Republic of the Congo)
• Linea Aerea Cuencana, a regional airline operating out of Cuenca, Ecuador
• Líneas Aéreas Canarias
• Lockheed Aircraft Company, American aerospace company
• Granada LAC, a BRT system in the city of Granada, Spain
• Lancing railway station, station code

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• Lanthanum carbide (LaC2)
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• Lac (disambiguation)
• LACS (disambiguation)
• LACC (disambiguation)

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