Department of the Treasury - Sub-Departments
The Department of the Treasury develops and enacts a multitude of policies concerning the management of federal finances, tax collection and currency, the supervision of national banks and the enforecement of tax laws, to name a few. Their overall aim is to promote and uphold the economic prosperity and financial security of the United States. In addition, they work to further economic growth around the world and raise the worldwide standard of living. 
This page contains a list of sub-departments that are a part of the Department of the Treasury. This is an active list that is open to change, and it is meant to be a convenient public reference, not an official list. All the sub-departments listed below are referenced from this department's government website , where an official list may be accessed.
The Alcohol and Tobacco Tax and Trade Bureau (TTB)
The Bureau of Engraving & Printing (BEP)
The Bureau of the Public Debt
The Community Development Financial Institution (CDFI) Fund
The Financial Crimes Enforcement Network (FinCEN)
The Financial Management Service (FMS)
The Inspector General
The Internal Revenue Service (IRS)
The Treasury Inspector General for Tax Administration (TIGTA)
The Office of the Comptroller of the Currency (OCC)
The Office of Thrift Supervision (OTS)
The U.S. Mint
- 'Bureaus.' United States Department of the Treasury. 06-07-2010. <http://www.ustreas.gov/bureaus/>.