| ACI | Airports Council International | 机场理事会国际 |
| ACI | American Concrete Institute | 美国混凝土学会 |
| ACI | Alloy Casting Institute | 合金铸造研究所[美] |
| ACI | atherosclerotic cerebral infarction | 脑动脉粥样硬化性脑梗塞 |
| ACI | African Cultural Institute | 非洲文化研究所 |
| ACI | Adjacent-Channel Interference | 邻频干扰 |
| ACI | Access Control Information | 接入控制信息 |
| ACI | Asynchronous Communication Interface | 异步通信接口 |
| ACI | Automatic Car Identification | 自动(铁路运输)车辆识别[美] |
| ACI | Allowable Concentration Index | 允许浓度指数 |
| ACI | Accessory Control Interface | 辅助控制接口 |
| ACI | Air Caledonie, New Caledonia (ICAO code) | 新喀里多尼亚喀里多尼亚航空公司(ICAO代码) |
| ACI | Airports Council International (formerly Airport Associations Coordinating Council) | 国际机场理事会(原机场协会协调理事会) |
| ACI | Association for Conservation Information | 保护信息协会 |
| ACI | Audit Committee Institute | 审计委员会协会 |
| ACI | Alderney, Channel Islands, United Kingdom - The Blaye (Airport Code) | 阿尔德尼,海峡群岛,英国-布莱(机场代码) |
| ACI | American Consumer Institute | 美国消费者协会 |
| ACI | Adult Correctional Institutions (Nebraska) | 成人教养所(内布拉斯加州) |
| ACI | Additional Circuit Information | 附加电路信息 |
| ACI | Amherst Consulting Inc (South Portland, ME) | Amherst Consulting Inc(南波特兰,ME) |
| ACI | Accelerated Capability Initiative | 加速能力倡议 |
| ACI | Advantage Consulting Inc (Annandale, VA) | Advantage Consulting Inc(弗吉尼亚州安南代尔) |
| ACI | American Combustion Industries Inc. | 美国燃烧工业公司。 |
| ACI | Accurate Contractors Inc | Accurate Contractors Inc公司 |
| ACI | Asset Condition Inspection | 资产状况检查 |
| ACI | Ashmore and Cartier Islands | 阿什莫尔和卡捷岛 |
| ACI | Agents Conseil Immobilier | Conseil Immobilier探员 |
| ACI | Active Community Initiative (UK) | 积极社区倡议(英国) |
| ACI | Accusativus Cum Infinitivo | Accusativus Cum Infinitivo公司 |
| ACI | AT Command Interpreter | AT命令解释器 |
| ACI | Adult Correctional Institute (Rhode Island) | 成人教养所(罗德岛) |
| ACI | Access Channel Integration (HP) | 接入通道集成(HP) |
| ACI | Arensmeyer Communications, Inc. | Arensmeyer Communications,Inc.公司。 |
| ACI | Acceptable Chronic Intake | 可接受的慢性摄入 |
| ACI | American Competitiveness Initiative (US government) | 美国竞争力倡议(美国政府) |
| ACI | Associative Computing, Inc. (now Associative Cognition, Inc.) | 联合计算公司(现为联合认知公司) |
| ACI | Allied Continental Intermodal (UK) | 联合大陆联运(英国) |
| ACI | Access Control Instruction (Netscape) | 访问控制指令(Netscape) |
| ACI | Airborne Control Intercept | 机载控制拦截 |
| ACI | AutoCAD Color Index | AutoCAD颜色索引 |
| ACI | Advanced Consulting Incorporated (Monterey, CA) | 高级咨询公司(加利福尼亚州蒙特雷) |
| ACI | Agincourt Collegiate Institute (Agincourt, Ontario, Canada high school) | 阿金库尔学院(加拿大安大略省阿金库尔高中) |
| ACI | After Care Instructions (medical) | 售后服务说明(医疗) |
| ACI | Airborne Controlled Intercept | 机载控制拦截 |
| ACI | Allocated Configuration Identification | 分配的配置标识 |
| ACI | Alltel Communications Inc. | Alltel通信公司。 |
| ACI | Audio Concepts, Inc. | 音频概念公司。 |
| ACI | Automated Criminal Investigation | 自动化刑事调查 |
| ACI | Azione Cattolica Italiana | 意大利叠氮芥 |
| ACI | Automatic Component Insertion | 自动插入元件 |
| ACI | Alexander Consulting, Inc. | 亚历山大咨询公司。 |
| ACI | Anixter Communication and Integration | Anixter通信和集成 |
| ACI | Arch Coal Inc | Arch煤炭公司 |
| ACI | Arts and Creative Industries (UK) | 艺术和创意产业(英国) |
| ACI | Advertising Council, Inc. | 广告委员会。 |
| ACI | Amplifier Control Inter-Communication | 放大器控制内部通信 |
| ACI | Amplifier Control Intercommunications | 放大器控制内部通信 |
| ACI | Applied Computational Intelligence | 应用计算智能 |
| ACI | Apple Computer, Incorporated | 苹果电脑公司 |
| ACI | Apollo Computers, Incorporated | 阿波罗计算机公司 |
| ACI | Approved Course of Instruction | 经批准的课程 |
| ACI | Automatic Card Identification | 自动卡识别 |
| ACI | American College Institute (Izmir, Turkey high school) | 美国大学学院(土耳其伊兹密尔高中) |
| ACI | Avataq Cultural Institute | Avataq文化研究所 |
| ACI | Acute Coronary Insufficiency | 急性冠状动脉功能不全 |
| ACI | Ann Clark Associates | Ann Clark Associates公司 |
| ACI | Autologous Chondrocyte Implantation | 自体软骨细胞植入 |
| ACI | Automatic Channel Installation | 自动通道安装 |
| ACI | Allocated Configuration Item | 分配的配置项 |
| ACI | Aurora Cable Internet | Aurora有线互联网 |
| ACI | Administratively Controlled Information | 行政控制信息 |
| ACI | Adjacent Channel Interference | 相邻信道干扰 |
| ACI | Albertson College of Idaho | 爱达荷州阿尔伯森学院 |
| ACI | Automatic Closure and Interlock | 自动关闭和联锁 |
| ACI | Advanced Communications Incorporated (Canton, MI) | Advanced Communications Incorporated(密歇根州坎顿) |
| ACI | Assign Call Inhibit | 分配呼叫禁止 |
| ACI | Autonomy Content Infrastructure | Autonomy内容基础架构 |
| ACI | Analytical Condition Inspection | 分析条件检查 |
| ACI | Advanced Consulting and Inspection, LLC (Lakeville, MN) | Advanced Consulting and Inspection,LLC(明尼苏达州莱克维尔) |
| ACI | Advanced Control Interface | 高级控制界面 |
| ACI | American Culinary Institute | 美国烹饪学会 |
| ACI | Anello Consulting Inc (Cocoa, FL) | 阿内洛咨询公司(佛罗里达州科科) |
| ACI | America's Career Infonet | 美国的职业Infonet |
| ACI | Automated Coding of Invoices | 发票的自动编码 |
| ACI | Applied Communications Inc. | 应用通信公司。 |
| ACI | Andean Counterdrug Initiative | 安第斯禁毒倡议 |
| ACI | Architectural Communications, Inc. | 建筑通信公司。 |
| ACI | Automobile Club d'Italia | 汽车俱乐部'Italia d |
| ACI | Air Combat Intelligence (US DoD) | 空战情报(美国国防部) |
| ACI | Access Control Integration, Inc. (Memphis, TN) | Access Control Integration,Inc.(田纳西州孟菲斯) |
| ACI | Automation Creations, Inc (Blacksburg, Virginia) | Automation Creations,Inc(弗吉尼亚州布莱克斯堡) |
| ACI | Associate Contractor Integration/Interface | 副承包商整合/接口 |
| ACI | Advanced Computing Initiative | 高级计算计划 |
| ACI | Adriatic Croatia International (Club and Nautical Tourism Company) | 亚得里亚海克罗地亚国际(俱乐部和航海旅游公司) |
| ACI | Agribusiness Council of Indiana | 印第安纳州农业商业委员会 |
| ACI | Actual Cost Incurred | 实际发生成本 |
| ACI | Asset Condition Index | 资产状况指数 |
| ACI | Appraiser's Choice, Inc | 鉴定人的选择、股份有限公司 |
| ACI | Alianza Contra la Impunidad (Spanish: Alliance Against Impunity, Guatemala) | 消除有罪不罚现象联盟(西班牙语:反对有罪不罚联盟,危地马拉) |
| ACI | Advanced Commercial Information (Canada) | 高级商业信息(加拿大) |