Background information on Apps technology

What is a good place to go to get information on the Oracle Apps technology stack? I'm thinking of the type of information that for the Oracle database is covered by the concepts manual (or by something like Tom Kyte's latest book) - stuff like what the database processes are, what is an instance, etc etc. For Apps, I'm not even sure I know the right questions to ask, but I'm guessing that things like the following would be covered:

• What are the various apps processes, and their functions?
• How does the concurrent manager work, what concurrent jobs are standard/significant infrastructure etc?
• How do Forms, Reports, Discoverer, etc fit into the picture?
• How does the Apache/Jinitiator web stack hang together?

I'm not even sure I'm asking the right sorts of thing, but I feel that there must be some sort of basic level of understanding of the technology that I should be able to grasp before starting to fiddle with things :-)

I've never found any courses or books that address this, which surprises me, as it seems pretty fundamental. But maybe I'm just not asking the right questions? Or is it simply such a big area that the expectation is that you specialise on one particular bit (like Financials, or HR)?

Feeling a bit confused, and grateful for any help,

Paul Moore.

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