Oceanic and Atmospheric Scientific Information Center海洋和大气科学信息中心 Ordnance Alteration Status Information System军械变更状态信息系统 Over-the-Horizon Airborne Sensor Information System航空传感器信息系统实施超视距 Operational Area Satellite Information System业务范围卫星信息系统 Organization for the Advancement of Structured Information Systems (formerly SGML Open)组织的结构化信息系统(原名SGML开启) Online Archival Search Information System (Harvard University)网上档案搜索信息系统(哈佛大学) Advancing Open Standards for the Information Society开放标准,推进信息社会 Obstetric Anesthesia Safety Improvement Study产科麻醉安全性改进学习 Optimized Air-To-Surface Infrared SeekerAir-To-Surface红外导引头预定参数优化 Online Administration School Information System网络管理信息系统的学校 Older Adult Service and Information Systems老年人服务和信息系统 Observation and Analysis of Smetic Islands in Space (NASA)Smetic岛屿的观察和分析,在空间(NASA) Oracle Application Software Implementation Strategy具体的应用软件实施策略 Overseas Access Service for Information Systems海外访问服务信息系统 On-Line Archive Science Information Services在线档案信息服务