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OCA or Oca may refer to: ==Business and politics== * Open Content Alliance, consortium of organizations contributing to a publicly accessible archive of digitized texts * Optimum currency area, geographical region which efficiently shares a single currency * Oregon Citizens Alliance, conservative Christian political activist organization * Organic Consumers Association, consumer protection and organic agriculture advocacy group * Organization of Chinese Americans, national Asian Pacific American social and civic organization * Oxford Conservative Association, student political organisation at the University of Oxford 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OCA」の詳細全文を読む スポンサード リンク
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