What does obc stand for on a club car golf cart?

It stands for On-Board Computer, it is used, I read anyway, to tell when to shut the charger off, but that's debateable. It is the little box on the drivers side that is mounted to the chassis that your lead battery cable on the drivers side goes thru on it's way towards the back of the cart. That cable goes thru the middle of the OBC to a sensor in there.