Match Column A with Column B definition:

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Information extraction An unsupervised process that classifies text documents into groups by applying various clustering algorithms.

Information Retrieval The automatic processing and analysis of unstructured textual information and allows computers to read via analyzing sentence structure and grammar.

Natural Language Processing The process of extracting out pertinent information and connected patterns from the given set of words or phrases.

Clustering The technique used to extract valuable information from a massive amount of data.

Categorization Aims to decrease the length, details, and complexity of a document while keeping significant points and actual meaning.

Summarization Methods such as preprocessing, indexing, dimensionality reduction, and classification with the objective of training classifiers on the basis of recognized examples.