Client-side virtualization refers to the practice of creating and managing virtualized computing environments on individual user devices, typically personal computers or laptops. This form of virtualization enables users to run multiple operating systems (OS) or instances on a single physical machine simultaneously. One common method for client-side virtualization is the use of hypervisors or virtual machine managers, which allocate resources such as CPU, memory, and storage to each virtualized instance. This allows users to isolate different environments, like running Windows on a machine primarily running macOS or vice versa. Client-side virtualization is widely utilized for various purposes, including software development, testing, running legacy applications, or achieving compatibility with different operating systems on a single device. It offers users flexibility, efficiency, and the ability to explore and experiment with different computing environments without the need for separate physical machines.