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Hypervisors refer to software systems that create and manage virtual machines (VMs) on physical hardware, facilitating the execution of multiple operating systems concurrently on a single computer system. They essentially serve as an intermediary between the host machine's hardware resources and the guest VMs, allowing for efficient utilization of computing resources while ensuring isolation among virtualized environments. Hypervisors are widely used in various domains, including electronics, computers, and data centers, to optimize resource allocation, enhance security, and enable seamless migration of workloads across physical machines.