I think I agree with DVK - IIRC, at the time, the whole Data->Logic->Presentation layer thing was an "enterprise" (basically: business) software buzzword.
Now that every goddamn web page should be three-tiered, it's much more common.
You also have to remember that while there's a lot of code other than business code, the amount of business code is huge, and a huge business (har har) as well. It's not really surprising that some terms originated there.
