| PDA | personal digital assistant | 个人数字助理 |
| PDA | public display of affection | 公众示爱 |
| PDA | Post-Deflection Accelerator | 偏转后加速器 |
| PDA | Probability Distribution Analyzer | 概率分布分析器 |
| PDA | Pump Drive Assembly | 泵传动装置 |
| PDA | Pennsylvania Dental Association | 宾夕法尼亚州牙科协会 |
| PDA | Polish Diabetes Association | 波兰糖尿病协会 |
| PDA | Philippine Dental Association | 菲律宾牙科协会 |
| PDA | Packaging and Design Association, Europe | 欧洲包装设计协会 |
| PDA | Production Design Associates | 生产设计协会 |
| PDA | Parenteral Drug Association (now the International Association for Pharmaceutical Science and Technology) | 肠外药物协会（现为国际药物科学技术协会） |
| PDA | Personal Digital Assistant (electronic handheld information device) | 个人数字助理（电子手持信息设备） |
| PDA | Premature Descent Alert (FAA TAWS) | 过早下降警报（FAA TAWS） |
| PDA | People's Democratic Alliance (Sierra Leone) | 人民民主联盟(塞拉利昂) |
| PDA | Predetermined Attendance (UK Fire Service) | 预定出勤率（英国消防局） |
| PDA | Push-Down Automata (theory of computation) | 下推自动机（计算理论） |
| PDA | Programmable Device Array | 可编程设备阵列 |
| PDA | Private Doctors of Australia | 澳大利亚私人医生 |
| PDA | Public Development Authority | 公共发展局 |
| PDA | Project on Defense Alternatives (Cambridge, MA) | 国防替代方案项目（马萨诸塞州剑桥） |
| PDA | Property Disposal Agent | 财产处置代理 |
| PDA | Preliminary Design Acceptance | 初步设计验收 |
| PDA | Pressurized Docking Adapter | 加压对接适配器 |
| PDA | Portfolio Design Analysis | 投资组合设计分析 |
| PDA | Power Distribution Assembly (Canadian, Australian and New Zealand Armies) | 配电组件（加拿大、澳大利亚和新西兰军队） |
| PDA | Photon Detector Assembly | 光子探测器组件 |
| PDA | Preventive Dental Assistant | 预防牙科助理 |
| PDA | Perdiemazing (TDY) system | 置换（TDY）系统 |
| PDA | P-Day | P日 |
| PDA | Parameter Data Area | 参数数据区 |
| PDA | Post-Delivery Availability | 交付后可用性 |
| PDA | Portable Digital Assistant | 便携式数字助理 |
| PDA | Physical Disability Appeal | 身体残疾上诉 |
| PDA | Partei Der Arbeit (Suisse Socialist Party) | Partei Der Arbeit（瑞士社会党） |
| PDA | Perry Davis Associates | Perry Davis联合公司 |
| PDA | Production Data Acquisition | 生产数据采集 |
| PDA | Principal Design Activity | 主要设计活动 |
| PDA | Personal Deposit Account | 个人存款账户 |
| PDA | Past Doctor Adventure (Doctor Who novel) | 过去的医生冒险（神秘博士小说） |
| PDA | Physical Disability Agency | 身体残疾机构 |
| PDA | Preliminary Design Audit | 初步设计审核 |
| PDA | Personal Database Application | 个人数据库应用程序 |
| PDA | Private Display of Affection | 私人情感展示 |
| PDA | Period-Doubling Analysis | 周期加倍分析 |
| PDA | Packet Downlink Assignment (GPRS) | 分组下行链路分配（GPRS） |
| PDA | Phased Disassembly Array (Homework-PC game) | 分阶段拆卸阵列（家庭电脑游戏） |
| PDA | Participant-Directed Retirement Account | 参与者定向退休账户 |
| PDA | Preliminary Design Assessment | 初步设计评估 |
| PDA | Pinoy Dream Academy (TV show) | 皮诺梦学院（电视剧） |
| PDA | Personal Delivery Assistant (gaming) | 个人配送助理（游戏） |
| PDA | Phillips, DiPisa and Associates | Phillips、DiPisa和联营公司 |
| PDA | Payday Advance Loan | 发薪日预付贷款 |
| PDA | Physical Demand Assessment | 物理需求评估 |
| PDA | Pile Driving Analyzer | 打桩分析仪 |
| PDA | Photonic Design Automation | 光子设计自动化 |
| PDA | Probabilistic Data Association | 概率数据辅助 |
| PDA | Persistent Ductus Arteriosus (cardiology) | 持续性动脉导管（心脏病学） |
| PDA | Potential Development Area | 潜在开发区域 |
| PDA | Pennsylvania Department of Agriculture | 宾夕法尼亚州农业部 |
| PDA | Property Disposal Account | 财产处置账户 |
| PDA | Phase Doppler Anemometry | 相位多普勒风速仪 |
| PDA | Principal Development Activity/Agency | 主要开发活动/机构 |
| PDA | Primary Docking Adapter (International Space Station) | 主对接适配器（国际空间站） |
| PDA | Personal Display of Affection | 个人情感展示 |
| PDA | Procurement Defense Agency | 国防采购局 |
| PDA | Preliminary Design Approval | 初步设计批准 |
| PDA | Probabilistic Data Association (algorithm for detecting radar target in clutter) | 概率数据关联（检测杂波中雷达目标的算法） |
| PDA | Project Development Agreement | 项目开发协议 |
| PDA | Planning and Decision Aid | 规划和决策辅助 |
| PDA | Post-Deflection Acceleration | 偏转后加速度 |
| PDA | Professional Development Alliance | 专业发展联盟 |
| PDA | Patent Ductus Arteriosus | 动脉导管未闭 |
| PDA | Panic Disorder with Agoraphobia | 惊恐障碍伴广场恐惧症 |
| PDA | Posterior Descending Artery | 后降动脉 |
| PDA | Personal Data Assistant | 个人数据助理 |
| PDA | Progressive Democrats of America | 美国进步民主党 |
| PDA | Potato Dextrose Agar | 马铃薯葡萄糖琼脂 |
| PDA | Propane Deasphalting | 丙烷脱沥青 |
| PDA | Pregnancy Discrimination Act | 《怀孕歧视法》 |
| PDA | Physical Device Address | 物理设备地址 |
| PDA | Production Data Area | 生产数据区 |
| PDA | Prostate Ductal Adenocarcinoma (rare form of prostate cancer) | 前列腺导管腺癌（罕见的前列腺癌） |
| PDA | Progressive Democratic Alliance (British Columbia) | 进步民主联盟（不列颠哥伦比亚省） |
| PDA | Personal Data Access | 个人数据访问 |
| PDA | Prioritized Defended Asset | 优先保护资产 |
| PDA | Program Decision Authority | 项目决策机构 |
| PDA | Post-Detection Amplifier | 后检测放大器 |
| PDA | Phase Doppler Analysis | 相位多普勒分析 |
| PDA | Public Disturbance Agency (gaming) | 公共骚扰局（游戏） |
| PDA | Place des Arts (Montreal cultural centre) | 艺术广场（蒙特利尔文化中心） |
| PDA | Preliminary Damage Assessment (American Red Cross; aka Windshield Survey) | 初步损害评估（美国红十字会；又名挡风玻璃调查） |
| PDA | Pathological Demand Avoidance (Syndrome) | 病理需求回避（综合征） |
| PDA | Percentage of Defectives Allowable | 允许缺陷百分比 |
| PDA | Procedure Departure Authorization | 程序离港授权 |
| PDA | Pretty Damn Arrogant | 真该死的傲慢 |
| PDA | Percent Defective Allowable | 允许缺陷百分比 |
| PDA | Photo-Diode Array | 光电二极管阵列 |
| PDA | Physical Display of Affection | 情感的物理表现 |
| PDA | Probability Decision Analysis | 概率决策分析 |
| PDA | Predetermined Arc | 预定弧 |