U.S. Citizenship and Immigration Services。米国の移民申請・審査を管轄する連邦機関。グリーンカード、EAD、市民権、ビザ延長などの申請を処理します。国土安全保障省（DHS）の下部機関で、国務省（ビザ発給）やCBP（入国審査）とは別組織です。
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