What Exactly Are IA Components?

Lou clarifies his post Selecting IA Components by defining what they are exactly (polar bear style).

I guess that if I'm going to prattle on about how to select information architecture components, as I did in my last posting, then I should probably spend a little time describing what exactly they are.

An IA component is any part of an information system (e.g., a web site) that gets users to content. Navigation bars, site maps, link labels, query languages, all are components of an information architecture.