/a></td></tr>
<tr><td class="num">37</td><td>&nbsp;</td><td><a href="http://oss.sgi.com/projects/ogl-sample/registry/SGIX/hyperpipe_group.txt">SGIX_hyperpipe</a></td></tr>
<tr><td class="num">38</td><td>&nbsp;</td><td><a href="http://www.opengl.org/registry/specs/SGIX/pbuffer.txt">SGIX_pbuffer</a></td></tr>
<tr><td class="num">39</td><td>&nbsp;</td><td><a href="http://oss.sgi.com/projects/ogl-sample/registry/SGIX/swap_barrier.txt">SGIX_swap_barrier</a></td></tr>
<tr><td class="num">40</td><td>&nbsp;</td