High Quality Content by WIKIPEDIA articles! One Thousand Children (often simply "OTC") refers to approximately 1400 mostly Jewish children who were rescued from Nazi Germany and Nazi-occupied or threatened countries by entities and by individuals within the United States of America, but specifically only those who came unaccompanied without their parent(s). The term also refers to the non-profit research and education organization One Thousand Children (OTC) whose primary purpose is to explore and document this little known segment of American history.