Vectorized Adobe Illustrator under free licence because:
<ul><li>simple shape (rectangle)</li>
<li>simple font (Calibri)</li></ul>
<ul><li><b>Original work:</b> <a href="https://en.wikipedia.org/wiki/Adobe_systems" class="extiw" title="w:Adobe systems">Adobe systems</a></li>
<li><b>This work:</b> <a href="//commons.wikimedia.org/wiki/User:Pypaertv" class="mw-redirect" title="User:Pypaertv">Pypaertv</a></li></ul>
This file was derived from: <a href="//commons.wikimedia.org/wiki/File:Adobe_Illustrator_CS3_icon.png" title="File:Adobe Illustrator CS3 icon.png">Adobe Illustrator CS3 icon.png</a><br>