While other central banks were emphasizing their QE policies, Chairman Bernanke for a while described some of the Fed's operations as credit easing, interventions in specific markets that are not functioning normally, such as the commercial paper market following the collapse of Lehman, and the markets for mortgage-based assets following the collapse of the housing price bubble.
These innovative interventions are closer to the lender of last resort function than to pure quantitative easing, in the sense that the central bank is lending in markets that have become dysfunctional or that are operating poorly, in significant part due to a loss of confidence in counterparties.