The Chronological File provides a continuous collection of fairly routine outgoing correspondence from 1964 to 1976. During the Deputy Administrator period, Chronological File correspondents include the NASA Administrator, Headquarters' staff and Center Directors, members of Congress, other governmental agencies, the national and international scientific community, industrial leaders, etc. Correspondence topics focus on the general management of the agency, including: recruitment and staff reductions, the development and management of myriad projects and programs in the areas of manned flight, satellite systems, and advanced aeronautics technology, budget formulation and use, agency goals, objectives and reorganization, and interagency and international cooperation. NASA Sensitive Chronological Files and the Note File augment the Chronological Files of this period. The Chronological Files of the Apollo Spacecraft Program Office Manager contain many more enclosures, such as background correspondence, reports, test results, graphs, briefing charts, meeting notes and minutes. During this period, correspondents include Program Office engineers and scientists, contractors, the NASA Headquarters' Apollo Program Office, the Manned Spacecraft Center director's office, and other NASA centers. These files reflect GML's management of the design, manufacture and testing of spacecraft hardware and systems, and include documentation of such activities as: coordination of changes and procedures, direction of anomaly studies, development and management of Manned Spacecraft Center/contractor relations, coordination of reviews at other sites (principly the Kennedy Space Center and Marshall Space Flight Center), and the forwarding of information to NASA Headquarters. Also included are broader agency and center concerns, such as advanced lunar missions and lunar exploration, the Lunar Receiving Laboratory, and the Manned Spacecraft Center's institutional plan. The Chronological Files of the Deputy Director period appear to have been culled from a larger body of material judging from the small amount of correspondence in this File. Correspondence is primarily with NASA Headquarters and Manned Spacecraft Center offices, and documents such varied concerns as: recruitment and personnel, procurement, contractor management, selection and training of astronauts, management of spacecraft testing, press relations, the transfer of programs to the Manned Spacecraft Center and the Center's role within the agency, the planning and development of such projects as the Lunar Receiving Laboratory, space science experiments, and the Apollo Applications Program, and post-Apollo 204 inspection and review activities. Also included are letters to George Mueller which GML authored for Robert Gilruth.