This report summarizes the results of the National Science Foundation's 1970 survey of scientific activities of independent nonprofit institutions. Data on the employment of scientists, engineers, and technicians, on expenditures, and on the R&D performance in the entire independent nonprofit sector are presented in section 1. Sections 2 and 4 focus on the employment of scientific manpower, on expenditures, and on research and development in research institutions, nonprofit-administered federally funded R&D centers, and voluntary hospitals, respectively. Section 5 provides information on a residual group of independent nonprofit organizations engaged in R&D performance, including a number of societies and academies of science, science exhibitors, private foundations, and other nonprofit organizations not elsewhere classified. (Author/AF)