These various published booklets are designed to aid the legislators in the performance of their duties. Though the content varies from year to year and in some years several volumes are published supplementing and even duplicating information presented, most often the manuals contain: rosters of members of the Senate and House and their respective constituencies; the standing committees and their members; the rules of each chamber; and the Constitution of the State of Georgia. The manuals also usually have hard or cardboard covers and vary in dimensions from 8" x 6" in the earlier years to 5 1/2" x 4 1/4" in later years. The rosters, on the other hand, are never hard-bound and always contain fewer pages.