| CLO | Chief Labour Officer | 工会主席 |
| CLO | Certified Leasing Officer (Real Estate Institute of Canada accreditation) | 注册租赁官（加拿大房地产协会认证） |
| CLO | Cali, Colombia - Alfonso Bonilla Aragon (Airport Code) | 哥伦比亚卡利-阿方索·波尼拉·阿拉贡（机场代码） |
| CLO | Chief Legal Officer (corporate title) | 首席法律官（公司职务） |
| CLO | Continental Liaison Office | 大陆联络办公室 |
| CLO | Commissariat aux Langues Officielles (Office of the Commissioner of Official Languages - Canada) | 官方语言委员会（加拿大官方语言专员办公室） |
| CLO | Congressional Liaison Officer | 国会联络官 |
| CLO | Control Link Oscillator | 控制链路振荡器 |
| CLO | Chris Lawrence Online | Chris Lawrence在线 |
| CLO | Community Living Ontario | 安大略省社区生活 |
| CLO | Contingency Liaison Officer | 应急联络官 |
| CLO | Campylobacter-Like Organism Test (rapid urease test for Helicobacter pylori infection) | 弯曲杆菌样生物试验（幽门螺杆菌感染的快速尿素酶试验） |
| CLO | campylobacter-like organisms | 弯曲杆菌样生物 |
| CLO | Customer Liaison Officer (business) | 客户联络官（商务） |
| CLO | Certified Local Ombudsman | 注册地方监察员 |
| CLO | columnar-lined oesophagus | 柱状食管 |
| CLO | Collateralized Loan Obligation | 抵押贷款义务 |
| CLO | Cod Liver Oil | 鳕鱼肝油 |
| CLO | Constant Level Oiler | 恒定液位注油器 |
| CLO | Cello | 大提琴 |
| CLO | Chief Learning Officer | 首席学习官 |
| CLO | Clothing | 服装 |
| CLO | Chief Logistics Officer | 首席后勤官 |
| CLO | Cornell Laboratory of Ornithology | 康奈尔鸟类学实验室 |
| CLO | Hypochlorite | 次氯酸盐 |
| CLO | Collegiate Living Organization | 大学生活组织 |
| CLO | Chlorine Monoxide | 一氧化二氯 |
| CLO | Civic Light Opera (Pittsburgh, Pennsylvania) | 公民轻歌剧院（宾夕法尼亚州匹兹堡） |
| CLO | Thermal Insulation of Clothes (unit of measure) | 衣服的隔热（计量单位） |
| CLO | Civil Liberties Organization | 公民自由组织 |
| CLO | Cross-Layer Optimizer | 跨层优化器 |
| CLO | Civil Liaison Officer | 民事联络官 |
| CLO | Community Liaison Office | 社区联络办公室 |
| CLO | Cryptographic Log On | 加密登录 |