The goal of the Adolescent Assessment/Referral System (AARS) project was to identify, collect, and organize all the appropriate materials associated with assessment and treatment referral for troubled youth 12 through 19 years of age. This document discusses the components of the AARS. After an introduction to the AARS, the structure and function of the AARS are described. In this section the 10 potentially problematic functional areas represented in each component of the AARS are listed: Substance Use/Abuse; Physical Health Status; Mental Health Status; Family Relations; Peer Relations; Educational Status; Vocational Status; Social Skills; Leisure and Recreation; and Aggressive Behavior and Delinquency. The next section describes the Problem Oriented Screening Instrument for Teenagers (POSIT), an instrument designed to identify problems in need of further assessment. The next section describes the Comprehensive Assessment Battery, a group of instruments which should be used when the POSIT has indicated that there is a possible problem. The last section outlines steps in the development of the Directory of Adolescent Services, a directory intended for use by practitioners who work with adolescents and require information about a broad range of provider services. It is noted that by developing a local or regional directory practitioners and administrators gain an increased familiarity with the array of resources available for addressing the medical, psychiatric, educational, and psychosocial needs of troubled adolescents. The instruments used with the AARS are included. (ABL)