Reminders of object programming on several languages
History and reference works
Fields of application
How to apply Design Patterns

Factory and Abstract Factory for creation under
Singleton and derivative conditions : control of available resources

The Composite, how to simplify the
Proxy and Adapter lists , the interfaces for accessing the methods
The Facade: clarifying a component

Strategy: the method factory
The iterator and its existing implementations
Observe: events without events
Chain of responsibility and responsibility trees
Visitor and access: mastery of collaboration
Overview of other Design Patterns