// Every world has its meaning
S: is single responsibility principle (SRP)
A class should take care of a Single Responsibility
O: stands for open closed principle (OCP)
Prefer extension over modification
L: Liskov substitution principle (LSP)
The parent class should be able to refer child objects seamlessly during runtime polymorphism
I: interface segregation principle (ISP)
A client should not be forced to use an interface, if it doesn’t need it
D: Dependency injection principle (DIP)
High level modules should not depend on low-level modules, but should depend on abstraction.