Windows 1.0, the first version of Microsoft Windows, was limited due to legal restrictions from Apple and did not allow overlapping windows. Windows 2.0 included support for Microsoft Office applications and saw slightly more popularity. Windows 3.0 was the first truly popular version thanks to improved graphics capabilities and support for multi-tasking applications. Windows is a family of operating systems from Microsoft used in personal computers, businesses, servers, and mobile devices in 16, 32 and 64-bit versions that incorporates applications like Internet Explorer.