| DEO | Diesel Engine Oil | 柴油发动机油 |
| DEO | Dearborn, Michigan (Airport Code) | 密歇根州迪尔伯恩（机场代码） |
| DEO | Deputy Executive Officer | 副执行官 |
| DEO | Dearborn, Michigan USA | 美国密歇根州迪尔伯恩 |
| DEO | Department of Economic Opportunity | 经济机会部 |
| DEO | Defense Employment Option | 国防就业选择 |
| DEO | Deutsche Evangelische Oberschule in Kairo (German Evangelist high school; Cairo, Egypt) | 凯罗德意志福音高级中学（德国福音派高中；埃及开罗） |
| DEO | Diageo, P. L. C. | 帝亚吉欧有限公司。 |
| DEO | Department of Extranormal Operations (DC Comics Universe) | 超常运行部（DC漫画宇宙） |
| DEO | Data Entry Operator | 数据输入操作员 |
| DEO | Desired Exhaust Oxygen | 所需排气氧 |
| DEO | Detention Enforcement Officer (Department of Homeland Security) | 拘留执行官（国土安全部） |
| DEO | Dynamic External Objects | 动态外部对象 |
| DEO | Deputy Education Officer | 副教育主任 |
| DEO | Digital End Office | 数字终端办公室 |
| DEO | Deodorant | 除臭剂 |
| DEO | Date Eyes Opened | 日期眼睛睁开 |
| DEO | Director of Emergency Operations | 应急运营总监 |
| DEO | Department of External Operations | 外部运营部 |
| DEO | District Engineer Office | 地区工程师办公室 |
| DEO | District Education Office | 地区教育办公室 |
| DEO | Diversification de l'Économie de l'Ouest Canada (Western Economic Diversification Canada) | Diversification de l'Économie de l'Ouest Canada (Western Economic Diversification Canada) |
| DEO | Divisional Enquiry Officer | 部门咨询官 |
| DEO | Direct Entry Officer | 直接入境官 |