This document discusses developing SharePoint 2013 apps with Visual Studio 2012. It covers the evolution of SharePoint development from 2003 to 2013 and the different customization options. Apps for SharePoint can be SharePoint-hosted, autohosted, or provider-hosted. Visual Studio tools allow debugging and publishing apps. The document demonstrates building apps using CSOM and REST APIs and emphasizes that SharePoint development going forward focuses on the cloud and these new APIs.