The document discusses various types of information products provided by libraries and information centers. It describes newsletters, in-house journals, trend reports, state-of-the-art reports, technical reports, patents, standards, bibliographies, indexes, abstracts, reviews, directories, and union catalogs. These information products consolidate and repackage information from various sources into succinct formats to facilitate access and use by specialists in different fields. They help overcome barriers created by the vast amount of information available.