This document provides an overview of the partnership between Cisco and VMware, outlining key events in their collaboration and joint product innovations over time, from Cisco acquiring Nuova Systems in 2008 and announcing the Unified Computing System (UCS), to VMware announcing vSphere 4 and the companies launching the Nexus 1000V virtual switch. It describes how their shared vision of data center virtualization, private clouds, and inter-clouds has led to integrated product development benefits.