This report presents the activities, accomplishments, and outcomes of a study of the long-term outcomes of augmentative and alternative communication (AAC) interventions with individuals with severe communication disabilities. The study evaluated long-term outcomes for 7 young men (ages 19-23 years) who had used AAC systems for at least 15 years. Outcomes were measured in the following domains: (1) receptive language; (2) reading comprehension; (3) communicative interaction; (4) functional communication; (5) educational and vocational achievement; (6) self-determination; and (7) quality of life. In addition, qualitative interviews were conducted to identify contextual factors that may have contributed to the measured outcomes. The study provided data regarding the feasibility of the outcome measurement tools used. It identified four factors believed to contribute, positively and negatively, to outcomes and communicative competence. These were: (1) attitudes of family members, professionals, peers and the general public; (2) cultural issues; (3) technological issues such as the operational demands of AAC systems; and (4) service delivery (a team approach is critical). (Contains approximately 135 references.) (DB)