Information retrieval (IR) is the subject area concerned with extracting information from a corpus or other information system. Software programs that deal with the organization, storage, retrieval and evaluation of information from documents are information retrieval systems. The field of informational retrieval was a precursor to the modern field of [[natural language processing]]. > [!Tip]- Additional Resources > - [Introduction to Information Retrieval](https://nlp.stanford.edu/IR-book/) (2008, Manning, Raghavan, Schutze)