<p>
Mesa is a 3-D graphics library with an API which is very similar to
-that of <a href="http://www.opengl.org/">OpenGL</a>.*
+that of <a href="https://www.opengl.org/">OpenGL</a>.*
To the extent that Mesa utilizes the OpenGL command syntax or state
machine, it is being used with authorization from <a
-href="http://www.sgi.com/">Silicon Graphics,
+href="https://www.sgi.com/">Silicon Graphics,
Inc.</a>(SGI). However, the author does not possess an OpenGL license
from SGI, and makes no claim that Mesa is in any way a compatible
replacement for OpenGL or associated with SGI. Those who want a
</p>
<p>
-* OpenGL is a trademark of <a href="http://www.sgi.com/"
+* OpenGL is a trademark of <a href="https://www.sgi.com/"
>Silicon Graphics Incorporated</a>.
</p>