When I first looked at Oracle website couple years ago, it was not that bad, but with all the aggressive acquisitions over last couple of years and continuous addition to their solution stack, it can get little difficult to find what all you can do or find the right solution for you.
(Images below can be clicked for actual-size display for readability)
Oracle Solution Stack
Oracle Business Intelligence and Performance Management offerings
Do not forget to check our my last post on famous Gartner’s Magic Quadrant on BI vendors for Oracle positioning.