This session discusses strategies, tools, and techniques for migrating enterprise software systems to AWS. We consider applications like Oracle eBusiness Suite, SAP, PeopleSoft, JD Edwards, and Siebel. These applications are complex by themselves; they are frequently customized; they have many touch points on other systems in the enterprise; and they often have large associated databases. Nevertheless, running enterprise applications in the cloud affords powerful benefits. We identify success factors and best practices.