Record types include: correspondence, photocopies, handwritten transcripts, publications, photographs, financial records and contracts. This is the only known extent collection of Bishop Otterbein' s papers in the Western Hemisphere. The collection contains autographs and his ministerial credentials.

This collection is made up of the administrative material from the Board of Missions. It also includes the records of the World Mission Division, the Division of Home Missions and Church Extension and its various departments and mission fields, the National Missions Division and the Mission Advance Program. The collection is made up of six series. Although there is some material from 1862 and the 1970's, the bulk of the material is from 1946 to 1968.