<p>what is an SIR? I know this is a really stupid question but I see it everywhere and I've been looking and googling but i cant get a definite answer anywhere at all..</p>
<p>Oh! It’s the Statement of Intent to Register. It’s like your commitment to the school. </p>
<p>For example, I will (within the week) SIR to UCB or UCLA. Still don’t know where though :(.</p>