The document discusses building an open cloud using Red Hat technologies. It argues that enterprises should build an open cloud out of all their existing resources, including physical, virtual, and public cloud options, in order to leverage existing investments and keep options open for the future. This approach balances enterprise needs like operations, governance, and risk mitigation with cloud benefits like agility, efficiency and on-demand resources. Red Hat's cloud vision and technologies like Red Hat Enterprise Linux, Red Hat Enterprise Virtualization, CloudForms, and OpenShift can help enterprises build such an open cloud.