The Constituent Correspondence Series is a continuation of the Correspondence Management System (CMS) Series and covers the period from 1989 until the Senator’s retirement in 2002. This series is arranged chronologically by year and alphabetically by subject within each year. The records within each folder are arranged in chronological order.

The material in the Strom Thurmond Collection Gubernatorial Series includes correspondence (both official and personal), campaign material, speeches and other items documenting Strom Thurmond's term as Governor of South Carolina from 1946-1951. Some of this material was originally part of the holdings of the South Caroliniana Library of The University of South Carolina and the South Carolina Department of Archives and History.

The Pinks series was the cross-reference file for subject correspondence generated by Senator Strom Thurmond's office for the period 1954-1976 before the introduction of the centralized Correspondence Management System by the Senate Computer Center in 1976. The original cross-reference files consisted of pink colored carbon paper copies-hence, the "Pinks" series.

The Subject Correspondence series is named for the central file used by Senator Strom Thurmond's office before changing over to a computerized filing system, the Correspondence Management Series (CMS), in 1976. Some subjects from the Subject Correspondence series for 1976 may overlap into the CMS series.