在沙发上(艺术)

On the Scene在场 Orbit Transfer System轨道系统 Office of Thrift Supervision (US Department of the Treasury)管理机构(美国财政部) Orbital Test Satellite轨道试验卫星 Occupational Therapy Student职业性疗法的学生 Offer to Settle (law)提供解决(法律) Oil Temperature Switch机油压力开关 Organization for Tropical Studies (Costa Rica)组织为热带研究(哥斯达黎加) Online Transaction System网上交易系统 Operational Technology Satellite实用技术卫星 Officer Training School军官培训学校 Off Tool Sample关闭工具的样品 Officers' Tactical School学校官员的战术 Officers' Training School军官训练学校 others其它的，其余的