Interactive System Productivity Facility交互系统生产力的设施 Internet Service Providers Forum网络服务提供商的论坛 Information System Project File信息系统项目文件 Incremental Shortest Path First增量最短路径 Interactive System Programming Facility交互系统编程设备 Istituto per la Storia del Pensiero Filosofico e Scientifico Moderno (Italian)Istituto Storia德尔Pensiero Filosofico每洛杉矶Moderno(意大利)Scientifico e