Can you name the main principles used in the design of software systems?

The main principles of software system design include:

• Modularity — dividing the system into independent, interchangeable modules.
• Encapsulation — hiding internal implementation and providing only the necessary interface.
• Abstraction — highlighting essential characteristics and hiding details.
• Reusability — creating components that can be used in different parts of the system or in different projects.
• Separation of concerns — each component is responsible for its specific task.
• Loose coupling — minimizing dependencies between modules.
• High cohesion — elements of a module are closely related in purpose.
• Single Responsibility Principle (SRP) — each class or module should have one reason to change.
• Open/Closed Principle (OCP) — software entities should be open for extension but closed for modification.

These principles help create maintainable, extendable, and understandable systems.