Parallels is a software company known for its virtualization solutions, most notably Parallels Desktop. This service enables users to run multiple operating systems, such as Windows, Linux, and macOS, on a single machine without rebooting. Parallels Desktop is particularly popular among Mac users who need to use Windows applications. Features of a subscription often include seamless integration between operating systems, performance optimization tools, and utilities for transferring files, applications, and settings across different platforms.