Forum OpenACS Q&A: Re: Some Feedback From an OpenACS Newbie
now see? that was nice.
anyway, the openacs is an offshoot of arsdigita's acs (there are people way more familiar with this than me.) the book talks about the beginnings of the acs.
halfway down discusses aolserver.
http://www.fifthgate.org/articles/aolserver/intro.html or http://philip.greenspun.com/wtr/aolserver/introduction-1.html
are a couple of others. you'll probably notice that it is older material -- there is more recent but i've forgotten where it is. i think there was a module to allow the oacs to run under iis and apache, but i don't know of what quality or stage of completeness those were.