| EO | Elementary Operation | 基本操作 |
| EO | Errors and Omissions | 错误与遗漏 |
| EO | Easter Orthodox | [宗]东正教 |
| EO | End Office | 终点站 |
| EO | Engineer Officer | 轮机官 |
| EO | Engine Out | 发动机失效 |
| EO | Enable Output | 允许输出，使能输出 |
| EO | End of Operation | 操作结束，运算结束 |
| EO | Executive Order | 执行命令 |
| EO | Easter Offerings | (基督教)复活节捐款 |
| EO | Electro-Optical | 电光的 |
| EO | Elliptical Orbit | 椭圆的轨迹 |
| EO | Emergency Operation | 急救手术 |
| EO | Engineering Order | 工程单 |
| EO | Engine Oil | 机油 |
| EO | Ethylene Oxide | 环氧乙烷，乙烯化氧 |
| EO | Exclusive OR | “异-或”逻辑(电路) |
| EO | Explosive Ordnance | 爆炸品 |
| EO | Engage Order | Engage订单 |
| EO | Extreme Offensive | 极度冒犯 |
| EO | Encarta Online (Microsoft) | Encarta Online（Microsoft） |
| EO | Evolved Online (message board) | 进化在线（留言板） |
| EO | Earth Escape Orbit | 地球逃逸轨道 |
| EO | Emeka Okafor (basketball player) | Emeka Okafor（篮球运动员） |
| EO | Equality Officer | 平等事务官员 |
| EO | Economical Office | 经济办公室 |
| EO | Epilepsy Ontario (Thornhill, ON, Canada) | 安大略省癫痫（加拿大安大略省桑希尔） |
| EO | Emergency Override | 紧急超控 |
| EO | Eight Ones | 八个一 |
| EO | Establishing Operation | 正在建立操作 |
| EO | Special Delivery Official (Scott Catalogue prefix; philately) | 特别递送官员（斯科特目录前缀；集邮） |
| EO | Ex Officio (Latin: By Virtue of Office) | 前任官员（拉丁语：凭借职务的优势） |
| EO | Essential Oil | 精油 |
| EO | Earth Observing | 地球观测 |
| EO | Exempt Organizations (accounting) | 豁免组织（会计） |
| EO | Esperanto (ISO Language Code) | 世界语（ISO语言代码） |
| EO | Employee Organization | 员工组织机构 |
| EO | Every Other | 每隔一个 |
| EO | Earth Orbit | 地球轨道 |
| EO | Execute Order | 执行订单 |
| EO | Extreme Offense | 极端冒犯 |
| EO | Earth Observatory | 地球天文台 |
| EO | Equipment Operator (Navy Seabee rating) | 设备操作员（海军Seabee等级） |
| EO | Electrolyzed Oxidizing | 电解氧化 |
| EO | Employers Organisation (UK government) | 雇主组织（英国政府） |
| EO | Erasable Optical | 可擦除光盘 |
| EO | Esperanto | 世界语 |
| EO | eosinophil(leukocyte) | 嗜酸性粒细胞（白细胞） |
| EO | exoccipital | 枕外的 |
| EO | effect of opening | 开口效应 |
| EO | Excessive Overkill | 过度压井 |
| EO | elbow orthosis | 肘矫形器 |
| EO | Edmonton Oilers (hockey) | 埃德蒙顿加油机（曲棍球） |
| EO | Extra Over (construction industry) | 额外费用（建筑业） |
| EO | ethanolamine oleate | 油酸乙醇胺 |
| EO | eosinophilia | 嗜酸性粒细胞增多 |
| EO | eyes open | 睁大眼睛 |
| EO | Electro Optics | 电光学 |
| EO | Electro-Optic | 电光 |
| EO | Equal Opportunities | 机会均等 |
| EO | End Opening | 端部开口 |
| EO | Essential Oils | 精油 |
| EO | Equal Opportunity | 机会均等 |
| EO | Euclid Orchestra (Euclid, OH) | 欧几里德管弦乐队（俄亥俄州欧几里德） |
| EO | (USN Rating) Equipment Operator | （USN等级）设备操作员 |
| EO | Event Order (hospitality industry) | 活动订单（酒店业） |
| EO | Evangelische Omroep (Dutch TV and radio) | Evangelische Omroep（荷兰电视和广播） |
| EO | Endless Online (computer game) | 无尽在线（电脑游戏） |
| EO | Enabling Objective | 启用目标 |
| EO | Eastern Oregon | 俄勒冈州东部 |
| EO | Early Out | 提前退出 |
| EO | Escrow Officer | 托管管理人员 |
| EO | Establishing Operation (applied behavior analysis) | 建立操作（应用行为分析） |
| EO | Education Otherwise (UK) | 其他教育（英国） |
| EO | Engagement Operations | 敬业度运营 |
| EO | Eve Online (game) | Eve Online（游戏） |
| EO | Electrical Operator (US Navy submarine watchstation) | 电气操作员（美国海军潜艇监视站） |
| EO | Earth Observation | 地球观测 |
| EO | Electro-Optic(al) | 电光（al） |
| EO | Ethics Officer | 道德操守干事 |
| EO | Engine/Engineering Officer (Navy) | 发动机/工程官员(海军) |
| EO | Eminent Occultist | 著名神秘学家 |
| EO | Enforcement Officer | 执法人员 |