d>&nbsp;</td><td><a href="http://www.opengl.org/registry/specs/NV/render_texture_rectangle.txt">NV_render_texture_rectangle</a></td></tr>
<tr><td class="num">50</td><td>&nbsp;</td><td><a href="http://www.opengl.org/registry/specs/NV/wgl_swap_group.txt">NV_swap_group</a></td></tr>
<tr><td class="num">51</td><td>&nbsp;</td><td><a href="http://oss.sgi.com/projects/ogl-sample/registry/NV/vertex_array_range.txt">NV_vertex_array_range</a></td></tr>
<tr><td class="num">52</td><td>&nbsp;</td><td><a href="http://