Sponsored by the Association of Research Libraries (ARL) and conducted by Ithaka S+R, this study provides insight into how ARL libraries are managing and funding the hundreds of digitized special collections they have created and that they believe to be critical to their futures. This is the first survey of ARL institutions that specifically attempts to understand and benchmark the activities and costs of supporting these collections after they are created. By looking at questions of management, costs, funding sources, impact, and outreach, the survey offers data that will deliver insight to all those engaged in sustaining digitized special collections.