Ocean Technological Information System海洋科技信息系统 On Time Installed System Delivery (TL 9000)准时交货(安装系统组合成的TL 9000个) Optimal Thermal Interpolation System最佳热插补系统 Optical Transpose Interconnection System光学变换互联系统 Online Transit Information System (Metropolitan Transit System MTS, San Diego, California)网上交通信息系统(都市运输系统MTS加州圣地牙哥的) Organization of Teratology Information Services组织畸信息服务 Ocean Thermal Interpolation System (US Navy source for sea surface temperature)海洋热插补系统(美国海军的来源,为海洋表面温度) Optimum Thermal Interpolation System最佳热插补系统 Operative Term is Stimulate (on-line art archive; now SITO)有效期限是刺激(在线艺术档案;现在SITO) Once-Through Integral System直流整体系统 Optimum Tracking Information System最优跟踪信息系统 Operations Terminal Information System (Southwest Airlines)操作终端信息系统(西南航空公司) On-line Transaction Insurance System在线交易保险制度 Of Thee I Sing我为您歌唱 Office of Telecommunication and Information Systems办公室的电信和信息系统