The NLECTC System consists of an integrated network of regional centers and centers of excellence (CoEs), with the National Center as the support hub. The NLECTC System helps the NIJ Office of Science and Technology determine research, development, testing, and evaluation (RDT&E) priorities; develops standards and test methods; and identifies best practices. During 2011, the NLECTC System worked with criminal justice professionals to identify urgent and emerging technology needs. NIJ sponsored research and development and identified best practices for addressing those needs. At the core of the NLECTC System is the concept of “translational technology,” which involves linking research to practice applications. The NLECTC National Center continued to serve as the information hub for the three regional centers and the seven CoEs. The National Center’s entry into the world of social media and its management of the NIJ-funded Compliance Testing Program for ballistic-resistant body armor, along with other equipment used by criminal justice agencies, ensured their quality and performance. The report on the activities of regional centers describes their range of scientific and technology information and other services related to results of NIJ research, development, testing, and evaluation activities. This included the development of a new content management system that streamlines the way that all 11 centers track their efforts to meet constituent needs. Activities in 2011 are also reported for each of the seven CoEs, which related to technologies in communications; corrections; electronic crime; forensics; information and glossarial technologies; sensor, surveillance, and biometric technologies; and weapons and protective systems technology.