The topic of assistive technology (AT) outcomes has only recently received attention in the professional literature. As a result, there is a considerable void in the profession's ability to address contemporary questions about the value and use of AT. The purpose of this article is to highlight the theory, development, and research efforts of the ATOMS Project as it seeks to create a prototype of an AT outcome measurement system. Specific attention is devoted to research efforts to socially validate selected components of a proposed outcome system. The results reveal significant support for a system that utilizes a theoretical framework; involves paper or electronic format data collection instruments that do not require extensive training and expertise; assimilates data from multiple sources; and provides visual representation of the data to facilitate interpretation and decision-making. The benefits and outcomes of this research and development agenda are described. (Contains 1 table.)