| Acronym | Definition |
|---|
| LCO | Lac Courte Oreilles (Wisconsin Native American Tribe) |
| LCO | Lithuanian Chamber Orchestra (est. 1960) |
| LCO | Liquid Carry Over (well site management) |
| LCO | Lodge and Convention (Lac Courte Oreilles Indian tribe; Hawyard, WI) |
| LCO | Local Connection Options |
| LCO | Learning Content Object |
| LCO | Load Control Object |
| LCO | Las Campanas Observatory (Chile) |
| LCO | Legislative Competence Order (Wales, UK) |
| LCO | Light Cycle Oil |
| LCO | Local Census Office |
| LCO | Levine Communications Office (PR firm; Los Angeles, CA, USA) |
| LCO | Limit Cycle Oscillation |
| LCO | Life Cycle Objectives (software development) |
| LCO | Lipo-Chitooligosaccharide |
| LCO | Local Cable Operator |
| LCO | Langues et Cultures d'Origine (French: Languages and Cultures of Origin) |
| LCO | London Contemporary Orchestra (UK) |
| LCO | Lithium Cobalt Oxide (batteries) |
| LCO | Late Check Out (lodging) |
| LCO | Lara Croft Online (gaming site) |
| LCO | Limiting Condition of Operation |
| LCO | Lloyds Claims Office (insurance; Lloyds of London; London, UK) |
| LCO | Lighterage Control Officer |
| LCO | Local Compliance Officer |
| LCO | Lifeline Connectivity Obligation (International Telecommunications Satellites Organization) |
| LCO | Low Cost of Ownership |
| LCO | Loopback Command Off |
| LCO | Land Conservation Officer |
| LCO | Land Combat Operations |
| LCO | Launching Control Officer |
| LCO | Labour Conciliation Officer |
| LCO | Launch Control Office(r) |
| LCO | Leyssens & Co |
| LCO | Local Control Organization |
| LCO | Lawn Care Operation/Operator |
| LCO | Layered Cobalt Oxide |
| LCO | Liquid Crystal Oscillator |
| LCO | Late Cornish (linguistics) |
| LCO | Literal Change Operator |