Bills are proposed legislation by the House or Senate. Bills from each chamber are assigned a number in the order in which they are introduced.
Ex. H.R. 8 S. 535
The text of bills can be found in a number of resources including those recommended and listed below.
Bills are also often found within specific Congressional Reports and also in the Congressional Record.
Westlaw provides the following:
Congressional Bills includes summaries and the text of congressional bills and resolutions introduced into the current session of Congress.
Historical Federal Bills, 1995 -
Bill Tracking includes summaries and status information for current legislation. A legislative calendar is also included.
Congressional Bills 1980-2000 can be found in the Library's Microfiche Collection.
Searching the Julien catalog for: Bills, Legislative -- United States is also recommended. Note the many Congressional Research Service Reports specific to bills that are listed for HeinOnline.