In the OpenStack community we are creating a platform that allows any business or service provider to build and deploy their own cloud. The intent is to support a wide range of application developers designing and deploying apps on top of a set of open services. OpenStack’s Nova compute service virtualizes compute. Swift virtualizes storage. Quantum is a network virtualization service that in essence makes it possible for each application or company to build their own virtual data center within a multi-tenant environment. In this talk, we will cover the origins of Quantum’s abstractions, use cases, and possibilities for both application developers and service providers.