The U.S. Serial Set is a collection of U.S. Government publications compiled under directive of the Congress. Publication began with the 15th Congress, 1st session in 1817. Documents before 1817 may be found in the American State Papers.
The Serial Set contains the House and Senate Documents and the House and Senate Reports.
The reports are usually from congressional committees dealing with proposed legislation and issues under investigation.
The documents include all other papers ordered printed by the House or Senate. Documents cover a wide variety of topics and may include reports of executive departments and independent organizations, reports of special investigations made for Congress, and annual reports of non-governmental organizations.
During the late nineteenth and early twentieth centuries, executive-branch materials were also published in the Serial Set.