This report contains information on the federal funding of research and development (R&D) components of agency programs as proposed for the fiscal year (FY) 2001-2003. Research and development data are classified into the same federal budget function categories as those used in "Budget of the United States Government, Fiscal Year 2001-2003." The report is divided into three sections. Section 1, "Federal R&D Budget Authority by Budget Function" consists of six tables. For the first time, table 1 contains total combined R&D and R&D plant data. Tables 2, 3, and 6 provide an overview of Federal R&D funding in the context of requested total Federal budget authority. Table 4 contains data on Federal R&D funding for national defense and civilian programs in current and constant 1996 dollars for FYs 1955-2003. Table 5 contains data on budget authority for basic research by budget function for FYs 2001-2003. Section 2, "R&D by Specific Budget Function" presents data on R&D activities conducted within each budget function. This section consists of 18 tables that provide a summary for FYs 2001-2003. Section 3, "Historical Tables", presents two historical data series: (1) Federal R&D funding by budget function for FYs 1955-2003; and (2) Federal funding of basic research for FYs 1978-2003. (KHR)