| PIA | Pakistan International Airlines | 巴基斯坦国际航空公司 |
| PIA | Plastics lnstitute of America | 美国塑料学会 |
| PIA | Peripheral Interface Adapter | 周边接口配接器 |
| PIA | Personal Information Assistant | 个人信息助理 |
| PIA | Pakistan International Airlines (ICAO code) | 巴基斯坦国际航空公司（ICAO代码） |
| PIA | Process Improvement Associates (training and management consulting company) | 流程改进协会（培训和管理咨询公司） |
| PIA | Primary Immunodeficiency Association | 原发性免疫缺陷协会 |
| PIA | Parachute Industry Association | 降落伞行业协会 |
| PIA | Peoria, IL, USA - Greater Peoria Airport (Airport Code) | 美国伊利诺伊州皮奥里亚-大皮奥里亚机场（机场代码） |
| PIA | pharmaceutical industries association | 制药工业协会 |
| PIA | Parachuting Industry Association | 跳伞行业协会 |
| PIA | Printing Industries Association | 印刷工业协会 |
| PIA | Proprietary Information Agreement | 专有信息协议 |
| PIA | Plant Inspection Assistant | 工厂检查助理 |
| PIA | Partnership Intermediary Agreement | 合伙中介协议 |
| PIA | Printing Industries of America | 美国印刷业 |
| PIA | Payment In Advance | 预付款 |
| PIA | Peoplesoft Internet Architecture | Peoplesoft Internet架构 |
| PIA | Pearson International Airport (Toronto, Canada) | 皮尔逊国际机场（加拿大多伦多） |
| PIA | Participatory Impact Assessment | 参与式影响评估 |
| PIA | Paid In Advance | 预付款 |
| PIA | Parent Interviews for Autism | 自闭症家长访谈 |
| PIA | Public Information Agency | 公共信息机构 |
| PIA | Program Independent Assessment | 项目独立评估 |
| PIA | Primary Interop Assembly | 主互操作组件 |
| PIA | Planned Incremental Availability | 计划增量可用性 |
| PIA | Power Interface Assembly | 电源接口组件 |
| PIA | Public Information Advisor | 公共信息顾问 |
| PIA | Philippine Information Agency | 菲律宾新闻局 |
| PIA | Part in Assembly | 部件中的部件 |
| PIA | Photometers for Imaging the Aurora (Astrid-2 spacecraft) | 极光成像用光度计（Astrid-2航天器） |
| PIA | Perfect Information Algorithm | 完美信息算法 |
| PIA | Photon-counting Image Acquisition | 光子计数图像采集 |
| PIA | Personal Investment Authority | 个人投资管理局 |
| PIA | Personal Injury Accident | 人身伤害事故 |
| PIA | photoelectronic intravenous angiography | 光电静脉血管造影术 |
| PIA | Power Injected Amplifier (structured home wiring for cable TV, internet, & audio distribution) | 注入功率放大器(结构化家布线、网络、有线电视、音响分布) |
| PIA | Professional Inventors Alliance | 专业发明家联盟 |
| PIA | Program Initiation Authorization | 程序启动授权 |
| PIA | Prison Industry Authority (California) | 监狱工业管理局（加利福尼亚州） |
| PIA | Particulate Impact Analyzer | 颗粒影响分析仪 |
| PIA | Program Initiation Agreement | 项目启动协议 |
| PIA | Primary Insurance Amount (US Social Security) | 主要保险金额（美国社会保险） |
| PIA | Progressive Indirect Attack | 渐进式间接攻击 |
| PIA | Pain in Ass | 臀部疼痛 |
| PIA | Proliferative Inflammatory Atrophy | 增殖性炎症性萎缩 |
| PIA | Platform For Information Applications | 信息应用平台 |
| PIA | Parole In Absentia | 缺席假释 |
| PIA | Partner In Angelicuss | Angelicuss合伙人 |
| PIA | Privacy Impact Assessment | 隐私影响评估 |
| PIA | Porcine Intestinal Adenomatosis | 猪肠道腺瘤病 |
| PIA | Programmable Interface Adapter | 可编程接口适配器 |
| PIA | Propagation and Infection Analysis | 传播和感染分析 |
| PIA | Pre Infarct Angina | 梗死前心绞痛 |
| PIA | Proxy Interceptor Agent | 代理侦听器代理 |
| PIA | Priority Inversion Avoidance | 优先级反转避免 |
| PIA | Products in Action | 正在使用的产品 |
| PIA | Programme Implementation Agency (India) | 方案执行局（印度） |
| PIA | Plastics Institute of America | 美国塑料学会 |
| PIA | Professional Insurance Agents | 专业保险代理人 |
| PIA | Pyongyang International Airport | 平壤国际机场 |
| PIA | Propellant Isolation Assembly | 推进剂隔离组件 |
| PIA | Post Instructional Activity (aka homework) | 课后活动（又名家庭作业） |
| PIA | Packet Immediate Assignment | 数据包立即分配 |
| PIA | Procurement Integrity Act | 采购诚信法案 |
| PIA | Protein Interaction Analysis | 蛋白质相互作用分析 |
| PIA | polyisopropenyl alcohol | 聚异戊二烯醇 |
| PIA | peak inspiratory cross sectional alveolar area | 峰值吸气横截面肺泡面积 |
| PIA | plasma insulin activity | 血浆胰岛素活性 |
| PIA | pancreatic isoamylase | 胰异淀粉酶 |
| PIA | Public and International Affairs | 公共和国际事务 |
| PIA | Primary Insurance Amount | 主要保险金额 |
| PIA | Peoria, Illinois USA | 美国伊利诺伊州皮奥里亚 |
| PIA | Please Inform Allah | 请通知真主 |
| PIA | Program Of Integrative Assignments | 综合作业计划 |
| PIA | Prayers In The Air | 空中祈祷 |
| PIA | People In Action | 行动中的人 |
| PIA | Paint, Ink, and Adhesives | 油漆、油墨和粘合剂 |
| PIA | Personal Internet Appliance | 个人互联网设备 |
| PIA | Principal Investment Area | 主要投资领域 |
| PIA | Pts Independent Antitermination | Pts独立反终止 |
| PIA | Program Integrity Assurance | 项目完整性保证 |