We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
IAW is an acronym appearing on page 1-6-2 of Book 2 of the official Nintendo documentation, presumably standing for "in accordance with," evidenced by the fact that page 1-6-10 explains about the "SA-1 registers according to the SA-1 CPU's program"