Lectures by scientists and engineers, award ceremonies, and conferences; films on field experiments, observational data, visualizations, and educational programs. Due to the nature of archival records, some content may include opinions, language, and/or stereotypes that are not consistent with current NSF NCAR and UCAR values. Speakers' views were their own at the time of recording and do not represent the views of NSF NCAR and UCAR. This project was supported by a Recordings at Risk grant from the Council on Library and Information Resources (CLIR). The grant program is made possible by funding from The Andrew W. Mellon Foundation. This project was also supported by the UCAR President's Strategic Initiative Fund.