Windows is a windowed operating system developed by Microsoft Corporation in the United States, introduced in 1985, initially only the command operating system DOS desktop environment, and then gradually developed into an operating system designed for personal computers and server users. The system eventually became the world's leading personal computer operating system software. In recent years, with the continuous upgrading and optimization of computer hardware and software, the Windows operating system also developed from the initial Windows 1.0 to the current Windows 8, and continue to update.