Natural language is any language used by human for communication. This book gives readers the information needed to perform rudimentary natural language processing on a computer. The terminology and methodology used by researchers in the field as well as nuts-and-bolts techniques for approaching simple problems. This book emphasized the three primary aspects of information processing--definition of the input and output functions, description and manipulation of the data, and design of the overall software system, including both data and program structure. Designed for computer science students and programmers who are interested in adding natural language interfaces to their software products.