This document discusses apps for Office 2013 and SharePoint 2013. It introduces the new app model that brings the web to Office and SharePoint, allowing developers to build apps that extend functionality. It describes the common app architecture with client and server APIs. It then discusses the different types of apps for Office 2013 that can work across Excel, Outlook, Word, PowerPoint and more using JavaScript. It also covers the different types of apps for SharePoint 2013, including SharePoint-hosted, auto-hosted and provider-hosted apps. It demos building a simple app for both Office and SharePoint.