In connection with our audit of the consolidated financial statements of the U.S. government, we audited and reported on the Schedules of Federal Debt Managed by the Bureau of the Fiscal Service (Fiscal Service) for the fiscal years ended September 30, 2017, and 2016. As part of these audits, we performed a review of information system controls over key financial systems maintained and operated by the Federal Reserve Banks (FRB) on behalf of the Department of the Treasury (Treasury) that are relevant to the Schedule of Federal Debt...