I've been looking around on the Success Center for a document which explains which Orion services do what, ie the Orion Module Engine, the Solarwinds Information Service V3, etc. I'm also interested in finding out how the different services interact with one another. A good example of what I am looking for would be how the individual services work together to send an email for an alert.
I can't really say that I found much.
I did find this Thwack post earlier (https://thwack.solarwinds.com/docs/DOC-170557#start=25 ), and it was a good place to start, but I didn't get much further. I'll be grateful for any other resources that I can be pointed toward.