System F

System F, also known as the polymorphic lambda calculus, is a formal framework in computer science that extends basic programming languages with advanced type features. It allows functions to operate on any type of data, making code more flexible and reusable. Think of it as a language that not only handles specific data types but can also create generic functions that adapt to different types as needed, similar to how a versatile tool can be used for various tasks. This system underpins many programming languages that support generics and type abstraction, enabling safer and more expressive code design.