The Materials Science and Engineering Laboratory (MSEL) of the National Institute of Standards and Technology (NIST) works with industry, standards bodies, universities, and other government laboratories to improve the nation's measurements and standards infrastructure for materials. A panel of experts appointed by the National Research Council (NRC) assessed the four divisions of MSEL, by visiting these divisions and reviewing their activities. This book concludes that, for the selected portion of the MSEL programs reviewed, the staff, the projects, and many facilities are outstanding. The projects are clearly focused on the mission of MSEL. The facilities and equipment are rationally upgraded within budget constraints, with several facilities being unique, the funding provided through the America COMPETES Act of 2007 is being used effectively. Division chiefs and staff evinced high morale, attributable to several factors: clear definitions of expectations and of the processes for realizing them, strong support of the MSEL from NIST leadership and of NIST generally from the President and from the Congress (through the American Competitiveness Initiative and the America COMPETES Act), and positive feedback from customers.