The wiki has been upgraded to MediaWiki 1.43. The wiki's theme is still being adapted to work with the new version, and may appear broken for the time being. --RanAS
IAW
From SnesLab
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"