FY 2009 Department of Defense R&D data are underreported by $7.7 billion in this report. Air Force underreported data for major systems development by a considerable amount and slightly overreported data for basic research, applied research, and advanced technology development. Air Force has since corrected these data. Revised FY 2009 data will be available in volume 60 (FY 2010–12) of the Federal Funds series of detailed statistical tables. Revised FY 2009 data will also be available in the forthcoming update of Science and Engineering State Profiles.