This document discusses building single page applications (SPAs) using AngularJS, ASP.NET MVC, and ASP.NET WebAPI. It introduces AngularJS as a powerful JavaScript framework for building SPAs and CRUD applications. It notes that while AngularJS makes applications easy to build, large JavaScript apps can be hard to maintain. It then introduces ASP.NET WebAPI for building RESTful APIs and ASP.NET MVC as a server-side framework. It argues that combining AngularJS, WebAPI and MVC takes the best of both worlds, allowing structure from MVC while offloading UI tasks to AngularJS for performance. The document contains code demos of each technology and how they can work