S -Single_responsiblity_Principle O -Open-closed_Principle L -Liskov_Substitution_Principle I -Interface_Segregation_Principle D -Dependency_Inversion_Principle
S -Single_responsiblity_Principle O -Open-closed_Principle L -Liskov_Substitution_Principle I -Interface_Segregation_Principle D -Dependency_Inversion_Principle