railway operation information system 铁路运营信息系统

Flight Operation Information System 飞行运营信息系统

downhole operation information system 井下作业信息系统

production and operation information system 生产经营信息系统

information retrieval system operation [计] [图情] 情报检索系统操作

operation room information system 手术室信息系统

operation management information system 运营管理信息系统

Flight Operation Management Information System 飞行运营管理信息系统

operation and management information system 运营管理信息系统