| ISA | Instrumentation, Systems, and Automation Society | 仪器、系统与自动化学会 |
| ISA | Instrument Society of America | 美国仪表学会 |
| ISA | International Safety Academy | 国际安全学会 |
| ISA | International Standards Association | 国际标准协会 |
| ISA | International Search Authority | 国际检索局 |
| ISA | Industrial Standard Architecture | 工业标准结构 |
| ISA | instruction set architecture | 指令集架构 |
| ISA | Integrated Services Architecture | 综合业务体系结构 |
| ISA | Israeli Space Agency | 以色列空间机构 |
| ISA | Information System Architecture | 信息系统结构 |
| ISA | Interim Standard Architecture | 临时标准体系 |
| ISA | India Semiconductor Association (Bangalore, India) | 印度半导体协会（印度班加罗尔） |
| ISA | International Synaesthesia Association | 国际通感协会 |
| ISA | Islamic Shipowners' Association | 伊斯兰船东协会 |
| ISA | International Students Association | 国际学生协会 |
| ISA | Indian Student Association | 印度学生协会 |
| ISA | International Student Association | 国际学生协会 |
| ISA | International Sociological Association | 国际社会学协会 |
| ISA | International Schools Association | 国际学校协会 |
| ISA | International Studies Association | 国际研究协会 |
| ISA | Irish Sailing Association | 爱尔兰帆船协会 |
| ISA | Interactive Services Association | 交互式服务协会 |
| ISA | International Spa Association | 国际水疗协会 |
| ISA | Ismaili Students Association | 伊斯梅利学生协会 |
| ISA | International Society of Appraisers | 国际估价师协会 |
| ISA | Idaho Sheriffs' Association | 爱达荷州治安协会 |
| ISA | Illinois Society of Anesthesiologists | 伊利诺伊州麻醉医师协会 |
| ISA | Israel Society of Anesthesiologists | 以色列麻醉医师协会 |
| ISA | Indiana Society of Anesthesiologists | 印第安纳麻醉医师协会 |
| ISA | Indian Society of Anaesthesiologists | 印度麻醉医师协会 |
| ISA | International Society of Arboriculture | 国际树木栽培协会 |
| ISA | Iowa Soybean Association | 爱荷华州大豆协会 |
| ISA | Irish Stammering Association | 爱尔兰口吃协会 |
| ISA | Indiana Sheep Association (Greenwood, Indiana) | 印第安纳绵羊协会（印第安纳州格林伍德） |
| ISA | Industry Standard Architecture (PC slot type) | 行业标准体系结构（PC插槽型） |
| ISA | Industry Standard Architecture | 行业标准体系结构 |
| ISA | Information Security Architecture | 信息安全体系结构 |
| ISA | International Strategic Alliance | 国际战略联盟 |
| ISA | Innovative Signal Analysis | 创新信号分析 |
| ISA | IBM Support Assistant | 助手 |
| ISA | In-Depth Safety Analysis | 深入安全分析 |
| ISA | Internal Security Act | 国内安全法 |
| ISA | Intrinsic Sympathomimetic Activity | 内在拟交感神经活动 |
| ISA | International Seabed Authority | 国际海底管理局 |
| ISA | Intelligent Speed Adaptation | 智能速度自适应 |
| ISA | Isaiah | 以赛亚 |
| ISA | Intermediate Staging Area | 中间暂存区 |
| ISA | International Standard Atmosphere | 国际标准大气 |
| ISA | Inshaallah | 因沙阿拉 |
| ISA | Intrasystem Analysis | 系统内分析 |
| ISA | International Security Affairs | 国际安全事务 |
| ISA | Interrupt Storage Area | 中断存储区 |
| ISA | Independent Safeguarding Authority (UK) | 独立安全局（英国） |
| ISA | Integrated Starter-Alternator | 集成起动交流发电机 |
| ISA | Inter-Service Agreement | 军种间协议 |
| ISA | Intelligence Support Activity (US Army) | 情报支持活动（美国陆军） |
| ISA | Interstellar Alliance (Babylon5) | 星际联盟（Babylon5） |
| ISA | Integrated Support Area | 综合支援区 |
| ISA | Instantaneous Selection Algorithm | 瞬时选择算法 |
| ISA | Israel Securities Authority | 以色列证券管理局 |
| ISA | Ionic Self-Assembly | 离子自组装 |
| ISA | International Stillbirth Alliance (Chicago, Illinois, USA) | 国际死胎联盟（美国伊利诺伊州芝加哥） |
| ISA | Infectious Salmon Anaemia | 传染性鲑鱼贫血 |
| ISA | Integrated Support Activity | 综合支持活动 |
| ISA | Integrated Safety Approach | 综合安全方法 |
| ISA | Integrated Stereo Amplifier | 集成立体声放大器 |
| ISA | International Standard on Auditing | 国际审计标准 |
| ISA | Integrated Safety Assessment | 综合安全评估 |
| ISA | Interservice Support Agreement | 军种间支援协定 |
| ISA | Investment Savings Account ( UK tax-free investment account) | 投资储蓄账户（英国免税投资账户） |
| ISA | Installation and Service Activity | 安装和维修活动 |
| ISA | Indian Set-Aside (grant) | 印度留出（赠款） |
| ISA | Is A (entity hierarchy in extended entity-relationship data model) | Is A（扩展实体关系数据模型中的实体层次结构） |
| ISA | Incident Surprise Anomaly Report | 意外事件异常报告 |
| ISA | IRS System Architecture | IRS系统架构 |
| ISA | Ignition & Separation Assembly | 点火和分离总成 |
| ISA | InterconexiÓn ElÉctrica SA (Colombia) | InterconexiÓn ElÉctrica SA (Colombia) |
| ISA | Information Society Assessment (EU) | 信息社会评估（EU） |
| ISA | Information Security and Assurance (International Conference) | 信息安全与保证（国际会议） |
| ISA | Inertial Sensor Assembly | 惯性传感器组合件 |
| ISA | International Society of Andrology | 国际男科学会 |
| ISA | Israel Space Agency | 以色列航天局 |
| ISA | International Searching Authority | 国际搜索机构 |
| ISA | Identifier Splitting Algorithm | 标识符分割算法 |
| ISA | Inprocess Sample Analysis | 过程中样品分析 |
| ISA | Installation Supply Activity | 安装供应活动 |
| ISA | Instrumentation Society of America (Research Triangle Park, North Carolina) | 美国仪器学会（北卡罗来纳州三角研究园） |
| ISA | International Society for Measurement and Control | 国际测量与控制学会 |
| ISA | Incomplete Stent Apposition | 支架放置不全 |
| ISA | Incest Survivors Anonymous | 乱伦幸存者匿名 |
| ISA | Ideal Survey Attributes (relate to key success factors in instrument development & quality improvement) | 理想的调查属性(相关仪器发展的关键成功因素及质量改进) |
| ISA | Interstage Adapter | 级间适配器 |
| ISA | International Subscription Agencies Pty Ltd (now RoweCom Australia Pty Ltd) | 国际认购代理有限公司（现为RoweCom Australia Pty Ltd） |
| ISA | Instituto Superior de Agricultura (Dominican Republic) | 高级农业研究所（多米尼加共和国） |
| ISA | Indicator-Based Stall Avoidance | 基于指示器的失速避免 |
| ISA | Information and Services Acquisition | 信息和服务采购 |
| ISA | Instructor of Small Arms | 轻武器教官 |
| ISA | Integrated Services Access | 集成服务访问 |
| ISA | Internet Security and Acceleration (Microsoft firewall and cache server) | Internet安全和加速（Microsoft防火墙和缓存服务器） |
| ISA | Integrated Systems and Aerostructures (Northrop Grumman Corp.) | 综合系统和航空结构（诺斯罗普·格鲁曼公司） |
| ISA | Information Superiority Assessment | 信息优势评估 |