z/VM

z/VM is an enterprise-level virtualization software designed by IBM that allows multiple, independent virtual computers—called virtual machines—to run simultaneously on a single physical mainframe server. It effectively partitions the hardware resources, such as memory and processing power, enabling organizations to efficiently manage and utilize their infrastructure. Each virtual machine operates as a separate system, running its own operating system and applications, which improves flexibility, security, and cost-efficiency. z/VM is widely used in large-scale data centers and headquarters to support diverse workloads while maximizing hardware investment.