Keinth Nino Durano developed and refined the core Course data model for the Decr0zeath/Simple-LMS-OOP-Project-2025 repository, focusing on scalable enrollment and reliable data persistence. Using Java and object-oriented programming principles, Keinth designed a Course class that encapsulates essential properties such as course ID, name, teacher, and a dynamic list of enrolled students. The implementation included constructors, accessors, enrollment management methods, and formatted output functions to support maintainability and reporting. By standardizing naming conventions and integrating related user models, Keinth improved code readability and consistency, laying a solid foundation for future enhancements in the project’s domain layer.