| PEM | Privacy enhanced mail | 保密邮件 |
| PEM | Polyethylene With Medium Density | 中密度聚乙烯 |
| PEM | project engineering manager | 项目设计经理 |
| PEM | Project Engineering Metrics | 项目工程度量 |
| PEM | Payload Ejection Mechanism | 有效载荷弹出机构 |
| PEM | Process Execution Module | 流程执行模块 |
| PEM | Personal Environmental Module | 个人环境模块 |
| PEM | Protein Energy Malnutrition | 蛋白质能量营养不良 |
| PEM | Partial Equilibrium Multimarket Model | 部分均衡多市场模型 |
| PEM | Proton Exchange Membrane | 质子交换膜 |
| PEM | Polymer Electrolyte Membrane | 聚合物电解质膜 |
| PEM | Psychological & Educational Measure | 心理与教育的措施 |
| PEM | Program Element Monitor | 程序元素监视器 |
| PEM | Polioencephalomalacia | 脊髓灰质炎脑软化症 |
| PEM | Plesk Enterprise Manager (Plesk) | Plesk企业经理（Plesk） |
| PEM | Peabody Essex Museum | 皮博迪埃塞克斯博物馆 |
| PEM | Photoelectromagnetic | 光电磁的 |
| PEM | Production Engineering Measure | 生产工程措施 |
| PEM | Photoelectron Microscopy | 光电子显微镜 |
| PEM | Public Expenditure Management | 公共支出管理 |
| PEM | Performance Evaluation Meeting | 绩效评估会议 |
| PEM | Pressure Equalizing Module | 压力均衡模块 |
| PEM | Phased Equipment Modernization | 分阶段设备现代化 |
| PEM | Power Engineering & Manufacturing (Waterloo, IA) | 电力工程、制造(滑铁卢之战,经由) |
| PEM | Polymorphic Epithelial Mucin | 多形上皮黏蛋白 |
| PEM | Pearson Educational Measurement | 皮尔逊教育测量 |
| PEM | Physics Environment Monitoring | 物理环境监测 |
| PEM | Privacy-Enhanced Mail (key encryption services for email) | 隐私增强邮件（电子邮件的密钥加密服务） |
| PEM | Processor Enhancement Module | 处理器增强模块 |
| PEM | Penn Engineering & Manufacturing Corp. | 佩恩工程及制造公司 |
| PEM | Properties, Events, Methods (object-oriented programming) | 属性、事件、方法（面向对象编程） |
| PEM | Potentially Explosive Material | 潜在爆炸材料 |
| PEM | Program Engineering Manager | 项目工程经理 |
| PEM | Personal Exposure Model | 个人接触模型 |
| PEM | Packaged Equipment Module | 成套设备模块 |
| PEM | Port Expansion Module | 端口扩展模块 |
| PEM | Project Execution Model | 项目执行模型 |
| PEM | Power Entry Module | 电源输入模块 |
| PEM | Predictive Emissions Monitoring | 预测排放监测 |
| PEM | pulmonary endothelial membrane | 肺内皮膜 |
| PEM | Prospective Evaluation Method | 前瞻性评估方法 |
| PEM | Precision Engineered Models | 精密工程模型 |
| PEM | Positron Emission Mammography | 正电子发射乳房摄影术 |
| PEM | Pediatric Emergency Medicine | 小儿急救医学 |
| PEM | Palustrine Emergent Wetlands | 沼泽应急湿地 |
| PEM | Properties, Events, Methods | 属性、事件、方法 |
| PEM | Persistent EMergent | 持久性应急 |
| PEM | Plant Engineering and Maintenance | 工厂工程和维护 |
| PEM | Physical Education Management | 体育管理 |
| PEM | Power Electronics Module | 电力电子模块 |
| PEM | Pacific Exploratory Mission (NCAR Atmospheric Chemistry Division) | 太平洋探索任务（NCAR大气化学部） |
| PEM | Pontiac Enthusiast Magazine | 庞蒂亚克狂热者杂志 |
| PEM | Parabolic Equation Method | 抛物线方程方法 |
| PEM | Production Efficiency Model | 生产效率模型 |
| PEM | Preliminary Engineering Model | 初步工程模型 |
| PEM | Position Entry Module | 位置输入模块 |
| PEM | Plastic Encapsulated Microcircuits | 塑料封装微电路 |
| PEM | Power & Environment Monitor | 电力和环境监控系统 |
| PEM | Partial Environment Monitor | 局部环境监视器 |
| PEM | Public Ethernet Manager | 公共以太网管理器 |
| PEM | Program Endorsement Memorandum | 项目批准备忘录 |
| PEM | Programme Engrais Malagasy (Malagasy Fertilizer Program) | 马达加斯加工程师计划（马达加斯加化肥计划） |
| PEM | Program Execution Manager | 程序执行经理 |
| PEM | Policy Enforcement Manager | 策略执行经理 |
| PEM | Program Element Manager | 项目要素经理 |
| PEM | Project Element Manager | 项目要素经理 |
| PEM | Particle Environment Monitor | 粒子环境监视器 |
| PEM | Performance-Enhancing Module | 性能增强模块 |
| PEM | Pediatric Epilepsy Monitoring | 小儿癫痫监测 |
| PEM | Program Editor macro (WordPerfect Library) | 程序编辑器宏（WordPerfect库） |
| PEM | Pareto Equilibrium Model | 帕累托均衡模型 |
| PEM | photo-electromagnetic effect | 光电磁效应 |
| PEM | polyethylene matrix | 聚乙烯基质 |
| PEM | Physical Electronic Mail | 实体电子邮件 |
| PEM | Programs Events and Methods | 程序、事件和方法 |
| PEM | primary enrichment medium | 初级富集介质 |
| PEM | Plesk Enterprise Manager | Plesk企业经理 |
| PEM | probable error of measurement | 可能的测量误差 |
| PEM | prescription-event monitoring | 处方事件监视 |
| PEM | peritoneal exudate macrophage | 腹腔渗出巨噬细胞 |
| PEM | Professional Event Management | 专业活动管理 |
| PEM | Puerto Maldonado, Peru | 秘鲁马尔多纳多港 |
| PEM | precordial electrocardiographic mapping | 心前心电图标测 |
| PEM | Penn Engineering And Manufacturing | 宾夕法尼亚大学工程与制造 |
| PEM | People's Ecology Movement | 人们的生态运动 |
| PEM | Photo Elastic Modulator | 光弹性调制器 |
| PEM | Parasitic Encephalitic Meningitis | 寄生虫性脑炎 |
| PEM | Plastic Encapsulated Microcircuit | 塑料封装微电路 |