| CLEO | Cumbria and Lancashire Education Online | 坎布里亚郡和兰开夏郡在线教育 |
| CLEO | Council on Legal Education Opportunity | 法律教育机会委员会 |
| CLEO | Come Listen Every One (Korean pop group) | 大家都来听（韩国流行组合） |
| CLEO | Conference On Lasers and Electrooptics | 激光和电光会议 |
| CLEO | Centrum voor Landbouw-Economisch Onderzoek (Dutch: Center for Agriculture-Economic Research) | Centrum voor Landbouw Economisch Onderzoek（荷兰语：农业经济研究中心） |
| CLEO | Clear Language for Expressing Orders (computer language) | 清晰的订单表达语言（计算机语言） |
| CLEO | Come Listen Every One | 来听每个人 |
| CLEO | Classified Energy Online | 在线分类能源 |
| CLEO | Customized Learning Experience Online (Carnegie Mellon University) | 定制在线学习体验（卡内基梅隆大学） |
| CLEO | Community Legal Education Ontario | 安大略省社区法律教育 |
| CLEO | Conference for Legal Education Opportunity | 法律教育机会会议 |
| CLEO | Chief Law Enforcement Officer | 首席执法官 |
| CLEO | Conference on Lasers and Electro-Optics | 激光和电光会议 |
| CLEO | Center in Law, Economics and Organization | 法律、经济和组织中心 |