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- Library of Congress. Congressional Research Service, issuing body7,355
- United States. Bureau of the Census1,578
- United States. Internal Revenue Service1,411
- CBS News, production company1,299
- Films for the Humanities & Sciences (Firm)1,071
- Infobase1,058
- Infobase, film distributor1,047
- CBS News713
- United States651
- United States. Department of State639
- CBS Inc., production company608
- United States. Social Security Administration597
- United States. Bureau of Labor Statistics556
- Geological Survey (U.S.)546
- Dallas TeleLearning (Firm), production company544
- Dyer, Julia535
- WGBH (Television station : Boston, Mass.), production company507
- Wolters Kluwer (Firm)489
- Obama, Barack476
- American Academy of Pediatrics, production company365