From FY 2000 to FY 2007 Department of the Air Force (AF) did not report BA 6.7 Operational Systems Development data to the Survey of Federal Funds for R&D because the agency misunderstood reporting requirements. During the Volume 57 data collection cycle AF corrected this error. Tables 1–5, 8, 11, 14, 49, 80, 82–85, 87–90, 92, 95, 97, 99, 103, 105, 115, 116, 120, 129  have been replaced with corrected versions.