Osteochondral Autograft Transfer System自体骨转移制度 Optical Alignment Transfer System光纤传输系统的结盟 Orthogonal Array Testing (test technique to provide maximum coverage from a test procedure with a minimum number of test cases)正交试验测试技术提供最大的覆盖范围从一个测试程序用最少的测试用例) Optimized Adaptive Trading System (stock market trading)自适应的交易系统进行股票交易 Older Adult Transportation System老年人交通系统 Open Architecture Test System开放式结构试验系统 Optical Attenuation Test Set光学衰减测试集 Orbit and Attitude Tracking轨道跟踪和态度 Over-The-Air Activation Teleservice空中活化远程服务 Office Automation Technology and Services (FAA)办公自动化技术和服务(FAA) Open Application Telephony Specification打开应用技术规格 Order Administration and Tracking System (Sprint)订单管理和追踪系统(冲刺) Open Air Test Site露天试验基地 Wild Oats Markets, Inc.野生燕麦市场,公司 Obligations Assimilables du TrÉsorObligations Assimilables du TrÉsor