This document discusses cataloguing and classification of information resources. It defines cataloguing as describing resources and linking users to them. The main types are descriptive, subject, and classification cataloguing. Descriptive cataloguing involves bibliographic elements like title, author, and imprint. Subject cataloguing determines the subject through parts of the resource. Classification assigns classification numbers to systematically group resources by subject. It discusses classification schemes like Dewey Decimal Classification and the importance of classification in facilitating organization and retrieval of resources.