| PIR | Public Information Research | 公众信息研究 |
| PIR | Partners in Research | 研究伙伴 |
| PIR | Property Investment Research | 资产投资研究 |
| PIR | Passive Infra Red | 电红外传感器 |
| PIR | Public Interest Registry | 域名注册组织 |
| PIR | Protease Inhibitors | 蛋白酶抑制剂 |
| PIR | Page Information | 页面信息 |
| PIR | Press InfoRmation | 新闻信息 |
| PIR | Priority Intelligence Requirements | 优先智能要求 |
| PIR | Pacific Islands Report | 太平洋岛报 |
| PIR | Police Initial Recruitment | 招募警察初选 |
| PIR | Pacific Islands Region | 太平洋岛地区 |
| PIR | Payment to Individual Report | 个人救济申请 |
| PIR | Precision Infrared Radiometer | 精密红外放射计 |
| PIR | Parker Information Resources | 帕克信息资源 |
| PIR | Project Implementation Reports | 项目执行报告 |
| PIR | Population InfoRmation | 人口信息资料 |
| PIR | Poverty Impact Ratio | 贫穷比率 |
| PIR | Post-Implementation Review | 工作回顾 |
| PIR | Packet Insertion Rate | 分组插入率 |
| PIR | Precision Instrument Rotator | 精密旋转仪器 |
| PIR | Pacific Islands Regiment | 太平洋岛群 |
| PIR | Passive Infrared Radiation | 被动红外辐射 |
| PIR | Pacific Islands Regiment | 太平洋岛编制 |
| PIR | Playwriting in the Round | 综合剧本 |
| PIR | Protein Information Resource | 蛋白质序列数据库资源 |
| PIR | Pierre, SD, USA - Pierre Municipal Airport (Airport Code) | Pierre，SD，美国-Pierre市政机场（机场代码） |
| PIR | Parents In Room (chat) | 家长在房间（聊天） |
| PIR | Permanent Impairment Rate (worker's compensation) | 永久性损伤率(工伤补偿) |
| PIR | Program Information Report | 项目信息报告 |
| PIR | Purchase Information Record | 采购信息记录 |
| PIR | Partners in Injury Reduction (Alberta, Canada) | 减少伤害合作伙伴（加拿大阿尔伯塔省） |
| PIR | Project Implementation Review (systems development methodology) | 项目实施审查（系统开发方法） |
| PIR | Priority Intelligence Requirement | 优先情报要求 |
| PIR | Polyisocyanurate | 聚异氰尿酸盐 |
| PIR | Parachute Infantry Regiment | 空降步兵团 |
| PIR | Pittsburgh Industrial Railroad | 匹兹堡工业铁路 |
| PIR | Phillips Investment Resources | 菲利普斯投资资源 |
| PIR | Primary Intelligence Requirement | 主要情报要求 |
| PIR | Planned Independent Requirement | 计划的独立需求 |
| PIR | Pressure Ignition Rocket | 压力点火火箭 |
| PIR | Post(-mortem) Incident Review | 死后事件审查 |
| PIR | Process Information Report | 工艺信息报告 |
| PIR | Pass In Review (military) | 通过审查（军事） |
| PIR | Procurement Information Reporting | 采购信息报告 |
| PIR | Property Irregularity Report (reporting lost/damaged luggage at an airport) | 行李不正常运输报告(报告丢失或损坏的行李在机场) |
| PIR | Pocono International Raceway | 波科诺国际赛车场 |
| PIR | Potential Impact Radius (natural gas pipeline) | 潜在影响半径（天然气管道） |
| PIR | Planned Installation Report | 计划安装报告 |
| PIR | Public Infrastructure Renewal (Canada) | 公共基础设施更新（加拿大） |
| PIR | Personnel Information Roster | 人事信息名册 |
| PIR | Price Is Right (TV show) | 价格合适（电视节目） |
| PIR | Periodic Interest Rate | 定期利率 |
| PIR | Police Initial Recruitment or Passive Infra-Red | 警察初始招募或被动红外 |
| PIR | Priority Information Report | 优先级信息报告 |
| PIR | Primary Image Record | 主映像记录 |
| PIR | Pile Installation Recorder | 桩安装记录仪 |
| PIR | Pierre, South Dakota USA | 美国南达科他州皮埃尔 |
| PIR | Parents In Room | 家长在房间 |
| PIR | Police Initial Recruitment Test | 警察初始招募测试 |
| PIR | Pupil Instruction Related | 学生教学相关 |
| PIR | Pittsburgh Industrial Railroad Incorporated | 匹兹堡工业铁路公司 |
| PIR | piriform(muscle) | 梨状肌（肌肉） |
| PIR | Pieuse Innovation De Registres | Pieuse Innovation注销 |
| PIR | postinhibitory rebound | 抑制后反弹 |
| PIR | Para Infantry Regiment | 准步兵团 |
| PIR | Portland International Raceway | 波特兰国际赛车场 |
| PIR | Pass In Review | 通过审核 |
| PIR | Pier 1 Imports, Inc. | 1号码头进口公司。 |
| PIR | Priority Information Requirement | 优先级信息要求 |
| PIR | Passive Infrared | 被动红外 |
| PIR | Planned Inventory Retrieval | 计划库存检索 |
| PIR | Phoenix International Raceway | 凤凰城国际赛道 |
| PIR | Problem Identification Report | 问题识别报告 |
| PIR | Problem Investigation Request | 问题调查请求 |
| PIR | Photon Irradiance Response | 光子辐照度响应 |
| PIR | Probabilistic Information Retrieval | 概率信息检索 |
| PIR | Project Implementation Report | 项目实施报告 |
| PIR | Private Information Retrieval (cryptography protocol/concept) | 私人信息检索(密码协议/概念) |
| PIR | Problem Investigation Report | 问题调查报告 |
| PIR | Proportional-Intensity-Reduction | 比例强度降低 |
| PIR | Preliminary Inspection Requirements | 初步检查要求 |
| PIR | Portland International Raceway (Portland, OR, USA) | 波特兰国际赛车场（美国俄勒冈州波特兰） |
| PIR | Priority Information Requirements | 优先级信息要求 |
| PIR | Provisional Integrated Rating | 临时综合评级 |
| PIR | Position in Range | 范围内的位置 |
| PIR | Protein Identification Resource | 蛋白质鉴定资源 |
| PIR | Program Incident Report | 项目事件报告 |
| PIR | Perpetual Inventory Record | 永久库存记录 |
| PIR | Periodic Intelligence Review | 定期情报审查 |
| PIR | patholgoic index rating | 病理学指数分级 |
| PIR | Portable ILS Receiver | 便携式ILS接收机 |
| PIR | polymerase-inducing unit | 聚合酶诱导单元 |
| PIR | Protocol Independent Routing | 协议无关路由 |
| PIR | Product Improvement Report | 产品改进报告 |
| PIR | Peak Information Rate (frame relay) | 峰值信息速率（帧中继） |
| PIR | Philippine Independence Ribbon | 菲律宾独立丝带 |
| PIR | Photo Interpretation Report | 照片判读报告 |