Synopsis Now a days, non-book materials are getting more and more importance in the librarian’s world. In earlier days, when the library were having only printed rather book collection, the cataloguing procedure was simple but with the introduction of non-book materials into the collection of libraries, the cataloguing procedure is becoming a tough task. This book aims to provide a concise account on cataloguing aspects of non-book materials in the libraries. Cataloguing of very new materials as of internet and digital resources has been discussed. Besides, the concept of online cataloguing is also discussed briefly to make acquainted the librarians with this new aspect.