Maintained by UC Berkeley Digital Library Sunsite, this new data library currently contains the following information from the 1990 Census of Population and Housing: Subject Summary Tape File 1 (SSTF 1), questions asked of every household; SSTF 2: Ancestry of the Population in the United States; Summary Tape File 3, questions asked of 1 in 7 households weighted to represent the total population; Subject Summary Tape File 3, Persons of Hispanic Origin in the US Sample data for this population; and SSTF 5: Characteristics of the Asian and Pacific Islander Population in the United States.