Updated class diagram (Final)

Students Enrollment Class Diagram 

Car and Driver Class Diagram 

ATM System Class Diagrams 

Database Class Diagram 

Article Manager Class Diagram 

Order And Payment Class Diagram 

Class Diagram Example: A Star-Based LAN 

GoF Design Patterns - Decorator 

GoF Design Patterns - Observer 

UML Class Diagram Example: Phone Book 

Telephone (Use of Association) Class Diagram Example 

GoF Design Patterns - Abstract Factory 

UML Class Diagram: Ticket Selling 

Class Diagram Realization Example 

Class Diagram Example: Company Structure 

Class Diagram Composition Example 

UML Class Diagram Example: Car 

Class Diagram Association Example 

UML Class Diagram for Self Association 

Class Diagram Aggregation Example 

GoF Design Patterns - Singleton 

Class Diagram Example: File Output (Use of Generalization) 

GoF Design Patterns - Interpreter 

GoF Design Patterns - Proxy 

GoF Design Patterns - Template Method 

GoF Design Patterns - Visitor 

Class Diagram Inheritance Example 

Class Diagram GUI Example 

Order Processing Class Diagram Example 

GoF Design Patterns - Factory Method 

UML Class Diagram: Association Class and Self Association 

GoF Design Patterns - Memento 

GoF Design Patterns - Strategy 

Class Diagram: Auctioneer and Bidder 

Class Diagram Example: A Token-Ring Based LAN 

GoF Design Patterns - Chain of Responsibility 

GoF Design Patterns - Flyweight 

Class Diagram - Classes and packages Constraints 

GoF Design Patterns - Composite 

GoF Design Patterns - Bridge 

GoF Design Patterns - Facade 

GoF Design Patterns - State 

GoF Design Patterns - Command 

Class Diagram Dependency Example 

GoF Design Patterns - Mediator 

GoF Design Patterns - Adapter 

GoF Design Patterns - Builder 

GoF Design Patterns - Iterator