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# About Qt

Qt is a multiplatform C++ GUI application framework. It provides application developers with all the functionality needed to build applications with state-of-the-art graphical user interfaces. Qt is fully object-oriented, easily extensible, and allows true component programming.

Since its commercial introduction in early 1996, Qt has formed the basis of many thousands of successful applications worldwide. Qt is also the basis of the popular KDE Linux desktop environment, a standard component of all major Linux distributions.

Qt is supported on the following platforms:

- MS/Windows -- 95, 98, NT 4.0, ME, 2000, and XP
- Unix/X11 -- Linux, Sun Solaris, HP-UX, Compaq Tru64 UNIX, IBM AIX, SGI IRIX and a wide range of others
- Macintosh -- Mac OS X
- Embedded -- Linux platforms with framebuffer support.

Qt is a product of Trolltech.

Qt is released in different editions:

  Qt Enterprise Edition and Qt Professional Edition provide for commercial software development. They permit traditional commercial software distribution and include free upgrades and Technical Support. For the latest prices, please see the Trolltech web site, Pricing and Availability page, or contact sales@trolltech.com. The Enterprise Edition offers additional modules compared to the Professional Edition.

  Qt Free Edition is the Unix/X11 version of Qt available for development of Free and Open Source software only. It is provided free of charge under the terms of both the Q Public License and the GNU General Public License. The latest version is available for download.

  Qt/Embedded Free Edition is the Embedded version of Qt available for development of Free software only. It is provided free of charge under the terms of the GNU General Public License.