This document discusses using Node.js on the Windows Azure platform. It provides an overview of Node.js and how it can be used with various Azure services like Web Apps, Cloud Services, HDInsight and Storage. It also includes code examples of interacting with Azure table storage, blob storage, queues and the service bus from Node.js applications. Additionally, it mentions how existing Azure services already use Node.js and how Node.js scripts can be used in Azure Mobile Services.