In this chapter, we will learn about modules and how they change the way we import frameworks into our files. We will cover both, the new and the old classes of the Foundation Framework, starting with the brand new NSProgress class. We will see some of the major improvements to the existing classes including NSArray and the firstObject method, NSTimer's new property for managing tolerance, the additional encodings now supported by NSData, and lastly new ways to manage URLs with NSURLUtilities. Let's get started!