The increased interest in virtualization has resulted in many people investigating virtualization technology. Exploring a different technology has the challenge of being introduced to new terminology and concepts. With over 30 years of experience in virtualization, z/VM on System z is the premier enterprise solution. This session is designed for those who are new to z/VM, are back working on z/VM after being away from it for a few years, or are just confused about the concepts of 'virtualization'. This session describes the basics of the virtualization in z/VM, the resources it can manage, and various other facilities it offers. Terminology that will be used in other z/VM sessions this week will be introduced and explained here. Even if z/VM is not the virtualization platform you will ultimately use, understanding it is helpful as it is often the benchmark used to judge others.