| CEI | China Economic Information(Network) | 中国经济信息 |
| CEI | Chiang Rai, Thailand - Chiang Rai (Airport Code) | 泰国清莱-清莱（机场代码） |
| CEI | Competitive Enterprise Institute | 竞争企业研究所 |
| CEI | Computational Engineering International | 国际计算工程 |
| CEI | Commission Electrotechnique Internationale (International Electrotechnical Commission) | 国际电工委员会 |
| CEI | Consumer Education Initiative (recycling) | 消费者教育倡议（回收） |
| CEI | Coastal Enterprises, Inc. | 沿海企业有限公司。 |
| CEI | Comunidad de Estados Independientes (Spanish: Commonwealth of Independent States) | Estados独立社区（西班牙语：独立国家联合体） |
| CEI | Comparably Efficient Interconnection | 相当高效的互连 |
| CEI | Clean Energy Initiative | 清洁能源倡议 |
| CEI | Committee on Environmental Issues | 环境问题委员会 |
| CEI | Computer Education Institute | 计算机教育学院 |
| CEI | Call for Expression of Interest | 征求意向书 |
| CEI | Center for Entrepreneurship and Innovation (University of Florida) | 创业与创新中心（佛罗里达大学） |
| CEI | Contract End Item | 合同结束项目 |
| CEI | Configuration End Item (NASA) | 配置结束项（NASA） |
| CEI | Chemistry Education International | 国际化学教育 |
| CEI | Center for Emerging Issues | 新兴问题中心 |
| CEI | Construction Equipment Institute | 建筑设备研究所 |
| CEI | Central European Initiative | 中欧倡议 |
| CEI | Cholinesterase Inhibitor | 胆碱酯酶抑制剂 |
| CEI | Creative Education Institute | 创意教育学院 |
| CEI | Comitato Elettrotecnico Italiano | 意大利电力技术委员会 |
| CEI | Communication Electronics Installation | 通信电子设备安装 |
| CEI | Christian Educators International | 国际基督教教育家 |
| CEI | Communications/ Electronics Intelligence | 通讯/电子情报 |
| CEI | ComisiÓn ElectrotÉcnica Internacional | ComisiÓn ElectrotÉcnica Internacional |
| CEI | Coastal Enterprises Inc | 沿海企业公司 |
| CEI | Crescent Real Estate Equities, Inc. | Crescent房地产股票有限公司。 |
| CEI | Chiang Rai, Thailand | 泰国清莱 |
| CEI | COMINT/ ELINT ( Communications Intelligence/ Electronic Intelligence) Integration | COMINT / ELINT(通信情报/电子智能集成 |
| CEI | Communications Electronics Instruction | 通信电子设备说明 |
| CEI | Committee on Environmental Improvement | 环境改善委员会 |
| CEI | Centro de Enriquecimiento de la Inteligencia (Guatemala) | Enriquecimiento de la intelligencia中心（危地马拉） |
| CEI | CorporaciÓn ElÉctrica Industrial (Spanish, Guatemala) | CorporaciÓn ElÉctrica Industrial (Spanish, Guatemala) |
| CEI | corneal epithelial involvement | 角膜上皮受累 |
| CEI | Comitato Elettrotecnico Italiano (Italian Electrotechnical Committee) | 意大利电工委员会 |
| CEI | cardiac effort index | 心力指数 |
| CEI | Communications Electronics Installation | 通信电子设备安装 |
| CEI | Comprehensive Emissions Inventory | 综合排放清单 |
| CEI | converting enzyme inhibitor | 转化酶抑制剂 |
| CEI | Conferenza Episcopale Italiana (Italian bishop conference) | 意大利主教会议 |
| CEI | committee for environmental improvement | 环境改善委员会 |
| CEI | Communications & Entertainment Inc. (Atlanta, GA) | 沟通的娱乐公司。(亚特兰大,GA) |
| CEI | committee for environmental information | 环境信息委员会 |
| CEI | Capital Equipment Inventory | 资本设备库存 |
| CEI | Career Education Institute | 职业教育学院 |
| CEI | Center for Emerging Issues (US Department of Agriculture) | 新兴问题中心（美国农业部） |
| CEI | Compliance Evaluation Inspection | 合规性评估检查 |
| CEI | Conferenza Episcopale Italiana | 意大利圣公会联合会 |
| CEI | Conducted Electromagnetic Interference | 传导电磁干扰 |
| CEI | Combustion Engineering Inc. | 燃烧工程公司。 |
| CEI | Connection Endpoint Identifier (UNI 3.0) | 连接端点标识符（UNI 3.0） |
| CEI | Canadian External Interface | 加拿大外部接口 |
| CEI | Communications Electronics Intelligence | 通信电子情报 |
| CEI | Coastal Environments Inc | 海岸环境公司 |
| CEI | Comparatively Efficient Interconnection | 相对高效的互连 |
| CEI | Competitive Edge, Inc. (Peachtree City, GA) | Competitive Edge，Inc.（佐治亚州桃树市） |
| CEI | Connected Element Interferometry | 连接元件干涉测量 |
| CEI | critical employment indicator (US DoD) | 关键就业指标（美国国防部） |
| CEI | COMINT/ELINT Integration | COMINT / ELINT整合 |
| CEI | Corporate Equality Index | 企业平等指数 |
| CEI | Construction Engineering & Inspection | 建设工程和检查 |
| CEI | Council of Engineering Institutions | 工程机构理事会 |
| CEI | Critical Equipment Indicator | 关键设备指示器 |
| CEI | Cleveland Electric Illuminating | 克利夫兰电力照明 |
| CEI | Commodity Exchange, Inc. | 商品交易所。 |
| CEI | Centennial Energy Institute (Centennial College, Toronto, Canada) | 百年能源学院（加拿大多伦多百年学院） |
| CEI | Configured End Item | 已配置的结束项 |
| CEI | California Electrical Inspectors | 加利福尼亚电气检验员 |