In software engineering, SOLID is a mnemonic acronym for five design principles intended to make software designs more understandable, flexible, and maintainable. The principles are a subset of many principles promoted by American software engineer and instructor Robert C. Martin, first introduced in his 2000 paper Design Principles and Design Patterns.
The SOLID concepts are:
The Single-responsibility principle The Open–closed principle The Liskov substitution principle The Interface segregation principle The Dependency inversion principle
