Special Notice: Commerce, Department of, National Institute of Standards and Technology (NIST) intends to negotiate a sole source contract with Clarivate Analytics for the acquisition of the Web of Science Database. The database will be used in the NIST Library and Museum on the NIST campus in Gaithersburg, MD. The Web of Science Database, which includes Science Citation Index Expanded, Technology Fee, and Conference Proceedings Citation Index, is essential for impact analysis to measure NIST research outputs. Clarivate Analytics is the only known vendor capable of providing the online subscription to Web of Science. Responses will be considered by the Government until December 15, 2023, 8:00 am, ET.