public debt - Cumulative amounts borrowed by the Treasury Department or the Federal Financing Bank from the public or from another fund or account. The public debt does not include agency debt (amounts borrowed by other agencies of the Federal Government). The total public debt is subject to a statutory limit.
Congressional Sessions lists all Congresses and corresponding years - from 1789, when the 1st Congress met, through the current Congress.
You can access legislative information, by bill number or key words, from the THOMAS Web site. Information from the present back to the 93rd Congress (1973) is available on THOMAS.
For information on the Senate, Congress, the legislative process and the federal government, the Virtual Reference Desk is a good place to begin.