This document discusses Hadoop and its relationship to Microsoft technologies. It provides an overview of what Big Data is, how Hadoop fits into the Windows and Azure environments, and how to program against Hadoop in Microsoft environments. It describes Hadoop capabilities like Extract-Load-Transform and distributed computing. It also discusses how HDFS works on Azure storage and support for Hadoop in .NET, JavaScript, HiveQL, and Polybase. The document aims to show Microsoft's vision of making Hadoop better on Windows and Azure by integrating with technologies like Active Directory, System Center, and SQL Server. It provides links to get started with Hadoop on-premises and on Windows Azure.