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<title>Qt 4.0: Qt Editions</title>
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<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="annotated.html"><font color="#004faf">Annotated</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td>
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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">Qt Editions</h1>
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<p>Qt can be used to create both commercial and non-commercial software for a wide range of different deployment environments, and is supplied in a number of different forms to suit the needs of different kinds of developers.</p>
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<p>In terms of license conditions, there are two main forms of Qt:</p>
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<li>The <a href="commercialedition.html">Qt Commercial Editions</a> are the commercial versions of <a href="aboutqt.html">Qt</a>.</li>
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<li>The <a href="opensourceedition.html">Qt Open Source Edition</a> is the non-commercial version of Qt. It is freely available for download.</li>
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<p>You may write commercial, proprietary, or otherwise non-free software only if you have purchased one of the <a href="commercialedition.html">Commercial Editions</a>. If you purchase a Commercial Edition, you are entitled to technical support and upgrades on any supported platform.</p>
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<p>Each Edition is available in a variety of different forms:</p>
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<table align="center" cellpadding="2" cellspacing="1" border="0">
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<tr valign="top" bgcolor="#a2c511"><th>Feature</th><th>Console</th><th>Desktop Light</th><th>Desktop</th></tr>
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<tr valign="top" bgcolor="#f0f0f0"><td>Qt Core classes</td><td>X</td><td>X</td><td>X</td></tr>
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<tr valign="top" bgcolor="#e0e0e0"><td>Qt GUI classes</td><td></td><td>X</td><td>X</td></tr>
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<tr valign="top" bgcolor="#f0f0f0"><td>Networking</td><td>X</td><td></td><td>X</td></tr>
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<tr valign="top" bgcolor="#e0e0e0"><td>OpenGL</td><td></td><td></td><td>X</td></tr>
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<tr valign="top" bgcolor="#f0f0f0"><td>Database/SQL</td><td>X</td><td></td><td>X</td></tr>
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<tr valign="top" bgcolor="#e0e0e0"><td>XML</td><td>X</td><td></td><td>X</td></tr>
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<p>The Commercial Desktop Edition also contains three database drivers (Oracle, IBM DB2, and Sybase), which are not included in the Open Source Edition because of license restrictions in the closed-source client libraries used to implement the drivers.</p>
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<p>Users of Commercial Editions can also take advantage of <i>Qt Designer</i>'s support for commercial Integrated Development Environments.</p>
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<td width="30%">Copyright © 2005 <a href="trolltech.html">Trolltech</a></td>
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<td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td>
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<td width="30%" align="right"><div align="right">Qt 4.0.0</div></td>
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