Editing Recommender system (section)

=== Natural language processing ===
Natural language processing is a series of AI algorithms to make natural human language accessible and analyzable to a machine.<ref>{{cite book |last1=Eisenstein |first1=J. |title=Introduction to natural language processing |date=October 2019 |publisher=MIT press |isbn=9780262042840}}</ref> It is a fairly modern technique inspired by the growing amount of textual information. For application in recommendation system, a common case is the Amazon customer review. Amazon will analyze the feedbacks comments from each customer and report relevant data to other customers for reference. The recent years have witnessed the development of various text analysis models, including [[latent semantic analysis]] (LSA), [[singular value decomposition]] (SVD), [[latent Dirichlet allocation]] (LDA), etc. Their uses have consistently aimed to provide customers with more precise and tailored recommendations.