This public resource provides information about 400,000 bills introduced in the U.S. Congress, currently 1947-2002, along with extensive information about each bill's progress and sponsor. It is used by researchers to study legislative institutions and behavior; by policy experts to study issue attention in Congress; and even by citizens studying their family histories (the dataset provides the only digitized records of tens of thousands of private bills introduced between 1947 and 1972). organized in a format that facilitates quantitative studies. the only digitizedsource for information about the 200,000 bills introduced between 1947 and 1972.