yield time - When the Senate has reached a unanimous consent agreement limiting the time for debate and placing it under the control of floor managers, a senator may be recognized to speak only if a manager yields the senator a specified amount of time to speak. The chair then recognizes the senator receiving the time, not the manager who yields the time, to hold the floor.
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.