A - Agriculture

C3- Census Bureau (Commerce Department)

D - Defense Department

E - Energy Department

ED - Education Department

GA - General Accounting Office

GS - General Services Administration

HE - Health and Human Services Department

I - Interior Department

I 19. - U.S. Geological Survey (Interior Department)

J - Justice Department

JU - Judiciary

L - Labor Department

LC - Library of Congress

NAS - National Aeronautics and Space Administration

PrEx - Executive Office of the President

S - State Department

SI - Smithsonian Institution

TD - Transportation Department

X,Y - Congress

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