This is a book about Natural Language Processing. By “natural language” we mean a
language that is used for everyday communication by humans; languages such as English,
Hindi, or Portuguese. In contra
st to artificial languages such as programming languages
and mathematical notations, natural languages have evolved as they pass from
generation to generation, and are hard to pin down with explicit rules. We will take
Natural Language Processing—or NLP for short—in a wide sense to cover any kind of
computer manipulation of natural language.