in optical astronomy, as interest in theoretical astrophysics, radio astronomy, and space astronomy grows, the proposed program is still based upon a straightforward projection. In view of the important contributions being made to the development of astronomy by observers with U.S. optical telescopes, to provide less than is recommended here would, in the opinion of the panel, mean a loss of momentum, and would constitute a retrenchment.There is no single index in radio in optical astronomy, as interest in theoretical astrophysics, radio astronomy, and space astronomy grows, the proposed program is still based upon a straightforward projection. In view of the important contributions being made to the development of astronomy by observers with U.S. optical telescopes, to provide less than is recommended here would, in the opinion of the panel, mean a loss of momentum, and would constitute a retrenchment.There is no single index in radio astronomy that represents the groundbased observing potential in the United States, particularly since modern antenna systems consist of both arrays and paraboloids. The growth of the major U.S. facilities is barely a decade old, and no long-term trends or growth rates can be said to have been established. The panel proposes a set of facilities demanded by the nature of the problems now faced in this field. These facilities will create capabilities for observational research commensu-astronomy that represents the groundbased observing potential in the United States, particularly since modern antenna systems consist of both arrays and paraboloids. The growth of the major U.S. facilities is barely a decade old, and no long-term trends or growth rates can be said to have been established. The panel proposes a set of facilities demanded by the nature of the problems now faced in this field. These facilities will create capabilities for observational research commensu-rate with these demands, and quite beyond any yet provided. The manpower, the techniques, and the engineering competence for realization of this goal are all in sight. Note