Normalization is not a principle of Object-Oriented Programming (OOP). This principle is actually a concept in database design and is not directly related to OOP.

To understand why normalization is not a principle of OOP, let's take a closer look at the other principles of OOP:

1. Inheritance: Inheritance is a fundamental principle in OOP that allows classes to inherit properties and behaviors from other classes. It promotes code reuse and helps to create a hierarchical relationship between classes. Through inheritance, classes can be organized into a hierarchy, with more general classes at the top and more specific classes at the bottom.

2. Encapsulation: Encapsulation refers to the bundling of data and methods within a class. It hides the internal details of an object and provides a public interface for interacting with the object. Encapsulation helps to achieve data abstraction and protects the integrity of an object's data by preventing direct access to it.

3. Abstraction: Abstraction is the process of simplifying complex systems by breaking them down into smaller, more manageable parts. In OOP, abstraction is achieved through the use of classes, which encapsulate data and behavior into objects. It allows developers to focus on the essential features of an object while hiding unnecessary implementation details.

Normalization, on the other hand, is a process used in database design to eliminate redundancy and improve data integrity. It involves organizing data into multiple tables and applying specific rules to ensure data consistency. Normalization is not specific to OOP and can be applied in any database system.

In summary, normalization is not a principle of OOP because it is a concept related to database design, not programming paradigms. OOP principles, such as inheritance, encapsulation, and abstraction, focus on code organization, reusability, and abstraction of complex systems.