| EUO | Easyuo (Ultima Online scripting tool) | Easyuo（Ultima在线脚本工具） |
| EUO | Eggs Ultima Online (free online game) | 鸡蛋终极在线（免费在线游戏） |
| EUO | Offices in Europe (International Monetary Fund) | 欧洲办事处（国际货币基金组织） |
| EUO | Examination Under Oath | 宣誓下的考试 |
| EUO | Union de l'Europe Occidentale (Western European Union, WEU) | 工会de fixation 'Europe Occidentale(西方欧盟、WEU) |
| EUO | Emergency Use Only | 仅供紧急情况下使用 |