The objectives of this contract are to continue a data archive of drug addiction and HIV research data, primarily archiving social and behavioral science data, though other data could be included. The vendor shall: 1. Develop, maintain, and expand data infrastructure and data archive access that complies with federal security requirements and provide tiered level of controlled data access; 2. Expand the holdings of NAHDAP by recruiting drug addiction and HIV social science and/or transdisciplinary researchers to deposit their data by actively working with the drug addiction and HIV research fields; 3. Ensure that deposited data get maximum use, in part by devising and implementing outreach and marketing strategies to ensure the drug addiction and HIV research fields are aware of the special topic archive and of what datasets are available for secondary analysis and by displaying the utility of this approach for addressing new research questions; 4. Monitor and track data use statistics and citations resulting from data archived in NAHDAP; 5. Provide technical assistance support to data producers and data depositors to assist in preparing their data for archiving and planning for the data deposition process; 6. Provide technical assistance support to data users, including organized workshops and trainings; 7. Develop a system to prioritize datasets and apply the appropriate level of curation to high priority datasets while making others available with less curation and cost; 8. Stay abreast of advances in the field of data archiving and integrating cutting edge strategies into the archive and implementing them when directed by the COR.