Template:Featured article/2023-04

Windows 1.0 was the first release of Windows, being released on November 20, 1985, in the United States, and later released on May 14, 1986, internationally.

Instead of being a standalone operating system, Windows 1.0 was a 16-bit graphical shell that ran on MS-DOS, providing an environment to run programs designed for Windows or MS-DOS. It introduced multitasking and the use of the mouse. Unlike every other Windows version, however, Windows 1.0 does not allow its windows to overlap and instead tiles them. Although overlapping is an exception to pop-up windows, menus, and dropdowns.