Contains both personal (1938-1993) and professional (1942-1994) papers that mostly document Anderson's adult life. Personal papers include correspondence and items relating to Anderson's ministry, family, Navy service, health and car insurance, investments, and retirement. Personal and family life are revealed through correspondence. Classroom notes, papers, tests, and quizzes from courses in mathematics and physics document Anderson's undergraduate and graduate work at Harvard University (1937-1948). Professional papers exist for activities directly relating to Oberlin College, and for external professional involvement. Included are correspondence, memoranda, notes, class syllabi, students' papers and exams, lecture outlines, drafts and final copies of books and articles written by Anderson, equipment and business trip records, grant applications, professional literature, and some photographs. Instructional and student files (1948-1988) include lecture notes, laboratory experiments, syllabi, grade books, handouts, and copies of examinations. A glimpse of his work at Los Alamos and contributions to the development of the atomic bomb can be found in his service papers, and recollections in newspapers articles, Harvard alumni bulletins, and correspondence. The Writings series is comprised largely of materials relating to technical articles, book reviews and monographs.