This Supplement to the Presidents Budget for Fiscal Year 2006 offers a brief technical outline of the 2006 budget request for the Networking and Information Technology Research and Development NITRD Program. Now in its 14th year, the NITRD Program is a unique collaborative enterprise of Federal agencies engaged in long-term R and D in information technology IT to support Federal missions and help sustain U.S. leadership in cutting-edge science, engineering, and technology. NITRD is the Nations primary source of fundamental breakthroughs in IT R and D and advanced education and training for the new generations of IT researchers, educators, and entrepreneurs required to maintain U.S. innovation and economic prosperity.The NITRD agencies coordinate their IT R and D activities in the following major research areas: high-end computing applications and infrastructure; high-end computing research and development; large-scale networking; human-computer interaction and information management; high-confidence software and systems; software design and productivity; and social, economic, and workforce implications of IT and IT workforce development.