| PEN | PENANG | 槟城 |
| PEN | Penang, Malaysia - Penang International (Airport Code) | 马来西亚槟城-槟城国际机场（机场代码） |
| PEN | Penalty | 处罚 |
| PEN | Probability, Electric Strength, Number of Life Cycles | 概率、电强度、寿命周期数 |
| PEN | Pennsylvania Environmental Network | 宾夕法尼亚州环境网络 |
| PEN | Poder Ejecutivo Nacional (Argentina) | Poder Ejecutivo Nacional（阿根廷） |
| PEN | Professional Employer Network | 专业雇主网络 |
| PEN | Penitentiary | 监狱 |
| PEN | Plain English Network (US government) | 纯英语网络（美国政府） |
| PEN | Provinciaal Energiebedrijf NoordHolland (Dutch) | 荷兰东北省Energiebedrijf（荷兰语） |
| PEN | Private Enterprise Number (assigned by the IANA) | 私营企业编号（由IANA分配） |
| PEN | Professional Executive Network | 专业高管网络 |
| PEN | Partido Encuentro Nacional (Paraguay) | 国家党（巴拉圭） |
| PEN | Primary Endosperm Nucleus | 初级胚乳核 |
| PEN | Private Electronic Network | 专用电子网络 |
| PEN | Peruvian Nuevo Sol (Currency) | 秘鲁新索尔（货币） |
| PEN | Public Education Network | 公共教育网络 |
| PEN | Personal Education Number | 个人教育编号 |
| PEN | Poets, Playwrights, Editors, Essayists, and Novelists | 诗人、剧作家、编辑、随笔家和小说家 |
| PEN | Project on Emerging Nanotechnologies | 新兴纳米技术项目 |
| PEN | Plan EnergÉtico Nacional | Plan EnergÉtico Nacional |
| PEN | Pay, Educate, and Nourish | 支付、教育和滋养 |
| PEN | Prose Essay And Narrative | 散文随笔与叙事 |
| PEN | Parenteral and Enteral Nutrition | 肠外与肠内营养 |
| PEN | Pentegra Dental Group, Inc. | Pentegra牙科集团。 |
| PEN | Protective Earth and Neutral (conductor) | 保护接地和中性点（导体） |
| PEN | Penetrating/Penetration | 渗透/渗透 |
| PEN | Persuasive, Expository, Narrative (basic styles of writing) | 说服性、解释性、叙事性（基本写作风格） |
| PEN | Positive-Electrolyte-Negative (solid oxide fuel cells) | 正极电解液负极（固体氧化物燃料电池） |
| PEN | Program Element Number | 程序元素编号 |
| PEN | Peer Education Network | 同伴教育网络 |
| PEN | Parent Empowerment Network (Washington state) | 家长赋权网络（华盛顿州） |
| PEN | Penang, Malaysia | 马来西亚槟城 |
| PEN | Permanent Employee Number | 永久雇员编号 |
| PEN | Penitentiary Emergency Network | 监狱应急网络 |
| PEN | Polyethylene Naphthalate (electrical insulation material) | 聚萘二甲酸乙二醇酯（电气绝缘材料） |
| PEN | Periodic Electronic Newsletter | 定期电子通讯 |
| PEN | PENicillin | 青霉素 |
| PEN | Poets Essayists And Novelists | 诗人、散文家和小说家 |
| PEN | Peruvian Nuevo Sol | 秘鲁索尔 |
| PEN | Uluslararasi Yazarlar Birligi | Uluslararasi Yazarlar Birligi公司 |
| PEN | Pacific Exchange Network | 太平洋交换网络 |
| PEN | Poets, Essayists, Novelists | 诗人、随笔家、小说家 |
| PEN | Pennsylvania Education Network | 宾夕法尼亚州教育网络 |
| PEN | Personal Empowerment Network | 个人授权网络 |