H. Ray Warren (1921-2011) was a physicist, engineer, and inventor at the Radio Corporation of America (RCA) for thirty-one years, working primarily on magnetic tape recording innovations. Warren's papers and audiovisual materials form a small collection that documents developments in magnetic recording for audio and video tape, primarily related to magnetic heads and low crosstalk processing signals. This collection is arranged into eight series: Personal files; Patent files; Proposals; Reports and technical data/information; SelectaVision files; Publications and reprints; Work meeting notes and photographs; and Audio and video recordings. The documentation is fragmentary; none of the sets of papers is complete.