Update README.md

Author: rromulos

README.md

@@ -10,4 +10,31 @@ Patterns are a toolkit of solutions to common problems in software design. They
 ### Classification
 Design patterns differ by their complexity, level of detail and scale of applicability. In addition, they can be categorized by their intent and divided into three groups.
 
+## Behavioral Patterns
+
+### Strategy
+Strategy is a behavioral design pattern that lets you define a family of algorithms, put each of them into a separate class, and make their objects interchangeable.
+
+## Creational Patterns
+
+### Builder
+Builder is a creational design pattern that lets you construct complex objects step by step. The pattern allows you to produce different types and representations of an object using the same construction code.
+
+### Prototype
+Prototype is a creational design pattern that lets you copy existing objects without making your code dependent on their classes.
+
+### Singleton
+Singleton is a creational design pattern that lets you ensure that a class has only one instance, while providing a global access point to this instance.
+
+## Structural Patterns
+
+### Adapter
+Adapter is a structural design pattern that allows objects with incompatible interfaces to collaborate.
+
+### Decorator
+Decorator is a structural design pattern that lets you attach new behaviors to objects by placing these objects inside special wrapper objects that contain the behaviors.
+
+
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+