- Lederberg's notes on a "software lock" to protect computers1
- Letter from Alan McGowan, Scientists' Institute for Public Information to Joshua Lederberg1
- Letter from Allen Thomson, United States Central Intelligence Agency to Joshua Lederberg1
- Letter from Arnold Thackray to Joshua Lederberg1
- Letter from Arthur M. Diamond, Jr. to Joshua Lederberg1
- Letter from Attallah Kappas to Joshua Lederberg1
- Letter from Barbara F. Crandall to Joshua Lederberg1
- Letter from Barbara J. Bachmann to Joshua Lederberg1
- Letter from Barbara McClintock to Elizabeth H. Blackburn1
- Letter from Barton J. Bernstein to Joshua Lederberg1
- Letter from Bernard D. Davis to Joshua Lederberg1
- Letter from Bonnie Kaiser, Institute for Scientific Information to Yukinori Hirota1
- Letter from Bryce Crawford, Jr., National Academy of Sciences to Alistair Brass, Annual Reviews1
- Letter from C. Everett Koop to George D. Lundberg, Journal of the American Medical Association (JAMA)1
- Letter from C. Everett Koop to Howard C. Filston, Duke University Medical Center1
- Letter from C. Everett Koop to James A. O'Neill, Jr., Children's Hospital of Philadelphia1
- Letter from C. Everett Koop to Leo Freihofer1
- Letter from C. Everett Koop to Vince L. Hutchins, United States Department of Health and Human Services, Division of Maternal and Child Health1
- Letter from Carl W. Cotman and Earl Usdin to Marshall W. Nirenberg1
- Letter from Charles J. Sherr, National Institutes of Health to Harold Varmus and J. Michael Bishop1