Flow of Funds Guid
http://www.federalreserve.gov/apps/fof/

This interactive documentation serves as a guide to the data compiled and published as part of the “Flow of Funds Accounts of the United States” (Z.1) data release and the Integrated Macroeconomic Accounts. This comprehensive documentation system is designed to help a user understand the links between series and underlying source data by providing the capability to search or browse the vast amount of information underlying the Z.1 and the Integrated Macroeconomic Accounts. This will be added to Financial Sources Subject Tracer™.