The Correspondence Management System (CMS) Series, formerly known as the Subject Correspondence Series, is named for the central filing system that was used by Senator Strom Thurmond's office for all incoming and outgoing correspondence between 1976 and 1988. The CMS Series covers this period with some overlaps with the Subject Correspondence files for 1976. Correspondence from 1989 through 2002 is included in the Constituent Correspondence Series.