Natural language understanding
Natural language understanding is like when a computer is able to understand what someone has said and be able to respond to it. For example, when you type something into a search engine, the computer is able to understand your words and give you results back. Natural language understanding is used to help computers "understand" what people are saying and answer their questions.
Related topics others have asked about:
Computational linguistics,
Computational semantics,
Deep linguistic processing,
Discourse representation theory,
History of natural language processing,
Information extraction,
Mathematica,
Natural-language programming,
Natural-language user interface,
Natural language processing,
Open information extraction,
Part-of-speech tagging