Question: Where can I find information about federal agencies?

For information about federal agencies see the United States government manual. This publication provides information on the agencies of the legislative, judicial and executive branches, as well as quasi-official agencies, international organizations in which the US participates, and boards, commissions, and committees. 

Appendix C is a listing of all terminated or transferred agencies. 

To find contact information for federal agencies, use The Federal Yellow Book (SMITH & REF COLL JK 6 .F45)