This document discusses building single page applications (SPAs) using AngularJS for the front-end framework, NancyFx for the back-end API framework, and MongoDB for data storage. It describes characteristics of SPAs and how they work, outlines advantages of the AngularJS, NancyFx, and MongoDB stack, and provides an example code repository for a demo SPA application built with this technology trio. Potential use cases and challenges of the SPA approach are also highlighted.