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I researched to find out what COBIT was by reading IT Governance Based on Cobit 4.1: A Management Guide (Paperback)
by Koen Brand and Harry Boonen.
COBIT is an IT Framework for Governance. It has similarities to ITIL and some overlap. One person told me that COBIT is what you build and ITIL is how you do it.
Anyways, I made a brief powerpoint presentation on COBIT which may be viewed from Here
Obviously very high level, but with pictures and some text, it will help.