Classic Online Racing Series经典的联机比赛系列 Copyright Online Royalties Service在线版税。版权 Cyber-Organization Results ScorecardCyber-Organization结果计分卡 Composite Operational Reporting System复合操作报告体系 Center on Organization and Restructuring of Schools在组织和重组的中心 Cerebellooculorenal SyndromeCerebellooculorenal综合症 Continuously Operating Reference Stations (NOAA)连续工作的参考电台(NOAA) Canadian Operational Research Society加拿大运筹学的社会 Commercial Residential Services Company商业住宅的服务公司 Code Opening and Routing Solution代码开放和路由的解决方案 Continuous Oxidation/Reduction System连续的氧化还原系统 Cargo Outrun Reporting System货物超出报告体系 Central Ontario Racing Series安大略省中部赛车系列 Centralized Online Registration System集中的联机登记制度 Continuously Operating Reference Station连续工作的参考