The primary component of the ARDA, the data archive, contains around 775 quantitative data files . ARDA staff do not themselves collect the data encompassed in these files; rather, the surveys' principal investigators submit their data to the ARDA for processing and archiving. Thus, the data files currently included in the archive originate from almost 200 different sources. Major data file contributors include the Presbyterian Panel Survey, the Southern Focus Poll, the U.S. Congregational Life Survey, and the Middletown Area Study. Data from the General Social Survey, the American National Election Studies, the World Religion Dataset, and the Pew Research Center are also available. Among the most common topics of information included are public opinions regarding social issues (e.g. abortion, homosexuality, the role of women), survey respondents' perceptions of God/the divine, and survey respondents' religious affiliations.