This collection of papers presents a representative selection of the National Institute of Justice's portfolio of gang-related research. The 10 papers are: (1) "A Decade of Gang Research: Findings of the National Institute of Justice Gang Portfolio" (Scott H. Decker); (2) "The Evolution of Street Gangs: An Examination of Form and Variation" (Deborah Lamm Weisel); (3) "Young Women in Street Gangs: Risk Factors, Delinquency, and Victimization Risk" (Jody Miller); (4) "Youth Gang Homicides in the United States in the 1990s" (Cheryl L. Maxson, G. David Curry, and James C. Howell); (5) "National Evaluation of the Gang Resistance Education and Training [G.R.E.A.T.] Program" (Finn-Aage Esbensen, Adrienne Freng, Terrance J. Taylor, Dana Peterson, and D. Wayne Osgood); (6) "Evaluating Nevada's Antigang Legislation and Gang Prosecution Units" (Terance D. Miethe and Richard C. McCorkle); (7) "Evaluation of a Task Force Approach to Gangs" (Susan Pennell and Roni Melton); (8) "Gang Prevention Programs for Female Adolescents: An Evaluation" (Katherine Williams, G. David Curry, and Marcia I Cohen); (9) "Reducing Gang Violence in Boston" (Anthony A. Braga and David M. Kennedy); and (10) "Developing a GIS-Based Regional Gang Incident Tracking System" (James W. Meeker, Katie J.B. Parsons, and Bryan J. Vila). (Papers contain references.) (SM)