No genealogist would be surprised to hear that U.S. federal census records are the most-used records for U.S. family history research. Population schedules are a great source for determining the location of a family unit in each decade. Beginning in 1850, every name is listed on the population schedule, as is place of birth. Slave owners are listed, and slaves are enumerated by quantity, gender, and age on the 1850 and 1860 slave schedules. More information is included on subsequent censuses. The 1880 population schedule includes the relationship of individuals in the household to one another. The year of arrival in the United States and naturalization status are included on 1900 to 1930 population schedules. The details available on the census documents can be very helpful, even though many of the documents microfilmed by the National Archives and Records Administration (NARA) are transcriptions of the original enumeration sheets.