bill - The principal vehicle employed by lawmakers for introducing their proposals (enacting or repealing laws, for example) in the Senate. Bills are designated S. 1, S. 2, and so on depending on the order in which they are introduced. They address either matters of general interest ("public bills") or narrow interest ("private bills"), such as immigration cases and individual claims against the Federal government.
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.