Explain the meaning of abstraction. Explain the three widely used abstraction mechanisms in application design concept?

Abstraction is a fundamental concept in computer science and software engineering that involves simplifying complex systems by focusing on the essential details while hiding unnecessary complexity. It allows developers to manage complexity, improve efficiency, and enhance maintainability by creating a higher-level representation of a system that encapsulates its essential features while suppressing its implementation details.

In the context of application design, abstraction is crucial for creating scalable, maintainable, and secure software systems. There are three widely used abstraction mechanisms in application design concepts:

1. Data Abstraction:
   Data abstraction involves representing essential features of data without exposing the underlying implementation details. It allows developers to define data types and __________ ______ _________ _____ ________ _____ ______ ___.
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