In software engineering, identifying major classes, their attributes, and operations is an important activity in object-oriented analysis and design. A class represents a group of objects having similar properties and behaviour. Identifying classes helps developers understand the structure of a software system and provides a foundation for preparing a class diagram and designing the system. The process begins by examining the requirements, use cases, and descriptions of the system. Important nouns in the requirements often indicate possible classes, while descriptive terms may indicate attributes and action words may suggest operations. However, every noun does not necessarily become a class. A candidate class should represent a meaningful entity or concept that has its own data and behaviour within the system. Major classes are the principal entities that participate in the functioning of a system. For example, in a library management system, possible major classes include Book, Member, Librarian, Loan, and Library. The Book class represents books available in the library, the Member class represents registered users, and the Loan class represents the borrowing of books. These classes interact