<p>The <dfn id="gdo"><abbr title="Garage Door Opener">GDO</abbr></dfn> is a
device that allows off-world teams to open the iris.</p>

<p>Teal'c activated his <a href="#gdo"><abbr title="Garage Door Opener">GDO</abbr></a>
and so Hammond ordered the iris to be opened.</p>
