Oregon Electric Sign Association俄勒冈州的电气签署协会 Oxford Emergency Safety Authority (Oakland County, Michigan)牛津紧急安全管理局(奥克兰县,密西根州) Ordo Eremitarum Sancti Augustini (old for OSA - Ordo Sancti Augustini)Eremitarum Sancti Augustini哲学系阻塞性睡眠呼吸暂停(老Sancti哲学系Augustini) Oleaginosas Españoles, S. A.Oleaginosas Españoles, S. A.