Design patterns in system design can be categorized into various types, including:

Creational Patterns: These patterns focus on object creation mechanisms and provide ways to create objects in a flexible and reusable manner. Examples of creational patterns include Singleton, Factory Method, Abstract Factory, Builder, and Prototype patterns.

Structural Patterns: These patterns focus on the organization of classes and objects to form a larger structure or system. Examples of structural patterns include Adapter, Bridge, Composite, Decorator, and Facade patterns.

Behavioral Patterns: These patterns focus on the interaction and communication between objects or components within a system. Examples of behavioral patterns include Observer, Strategy, Command, Iterator, and Template Method patterns.

Architectural Patterns: These patterns provide high-level guidelines and strategies for designing the overall architecture of a system. Examples of architectural patterns include Model-View-Controller (MVC), Model-View-ViewModel (MVVM), Layered architecture, Microservices, and Event-Driven architecture patterns.