Information, now, has come to occupy a pivotal role, to be reckoned as a driving force, for all human development. Therefore, the information created from different sources needs to be processed, retrieved, and kept ready to be served to the world of users, who wants to know in order to use it.

An attempt has been made here to present an integrated view of the subject of information processing and retrieval. However, this volume gives only an introduction about them. The purpose has been mainly to help in the creation of such a tool, which helps in making information available and thus provide an effective communication link between the information sources and the seekers of information.