retrospective searching

Retrospective searching, also known as information retrieval, is a core library service focused on satisfying user information needs by actively exploiting a collection. It involves librarians helping users find information by efficiently searching various resources like catalogs, indexes, and databases. This service grew significantly after World War I due to increased research and publication.1

The process can yield results ranging from factual answers to bibliographies. When using computer databases, a search might initially yield many results ("hits"), which are then refined by narrowing the subject or defining the information needed more precisely. The goal is to match the user's query terms with those used by authors and catalogers. This contrasts with current-awareness service, which informs users about new acquisitions.12