| National Hispanic Colorectal Cancer Outreach and Education Project | National Hispanic Construction Association | National Hispanic Corporate Council | National Hispanic Council on Aging | National Hispanic Cultural Center |
| National Hispanic Cultural Center Foundation | National Hispanic Cultural Center of New Mexico | National Hispanic Education Alliance | National Hispanic Environmental Council | National Hispanic Heritage Month |
| National Hispanic Institute | National Hispanic Leadership Initiative on Cancer | National Hispanic Media Coalition | National Hispanic Medical Association | National Hispanic Prenatal Helpline |
| National Hispanic Press Foundation | National Hispanic Professional Organization | National Hispanic Psychological Association | National Hispanic Recognition Program | National Hispanic Rodeo Clowns Association |
| National Hispanic Sales Network | National Hispanic Scholarship Fund | National Hispanic University | National Hispanic Youth Initiative | National Historical Archives of Belarus |
| National Historical Geographic Information System | National Historical Institute | National Historical Landmarks | National Historical Publications and Records Commission | National Historic Chemical Landmark |
| National Historic Civil Engineering Landmark | National Historic Landmark Area | National Historic Landmark District | National Historic Lighthouse Preservation Act of 2000 | National Historic Lookout Register |
| National Historic Mining Initiative | National Historic Park | National Historic Preservation Act | National Historic Preservation Act of 1966 | National Historic Preservation Fund |
| National Historic Preservation Program | National Historic Preservation Society | National Historic Seaport | National Historic Ships Committee | National Historic Ships Unit |
| National historic site | National Historic Site | National Historic Sites Alliance for Ontario | National Historic Trail | National Historic Trails Interpretive Center |
| National History Day | National History Day in Indiana | National HIV/AIDS Council and Secretariat | National HIV/AIDS Strategic Plan | National HIV and Retrovirology Laboratories |
| National HIV Behavioral Surveillance | National HIV Nurse's Association | National HIV Prevention Information Service | National HIV Sentinel Surveillance System | National HIV Testing Day |
| National Hockey League | National Hockey League Central Scouting | National Hockey League Fans' Association | National Hockey League Hockey Operations | National Hockey League Players' Association |
| National Holistic Institute | National Home and Hospice Care Survey | National Homebrew Competition | National Home Care Month | National Home Centers Incorporated |
| National Home Education Network | National Home Education Research Institute | National Home Equity Mortgage Association | National Home for Disabled Volunteer Soldiers | National Home Furnishing Industry |
| National Home Gardening Club | National Home Health Care Foundation | National Home Inspector Examination | National Homeland Security Agency | National Homeland Security Council |
| National Homeland Security Knowledgebase | National Homeland Security University | National Home Modification Action Coalition | National Home of Your Own Alliance | National Home Oxygen Patients Association |
| National Home Planning Service | National Home Protection Alliance | National Home School Honor Society | National Homeschool Music Ensembles | National Honey Board |
| National Honey Packers and Dealers Association | National Honor Roll | National Honor Society | National Hormone Pituitary Program | National Horse Judging Team Coaches Association |
| National Horsemen's Benevolent and Protective Association, Inc. | National Horse Protection Coalition | National Horse Protection League | National Horse Racing Association | National Horseshoe Pitchers Association of America |
| National Horseshoe Pitchers Foundation | National Horse Show Association of America Ltd. | National Horse Show Commission | National Horticulture Board | National Horticulture Board India |
| National Horticulture Mission | National Hose | National Hose Thread | National Hospice and Palliative Care Organization | National Hospice Foundation |
| National Hospice Organization | National Hospice Palliative Care Week | National Hospice Regatta Alliance | National Hospice Work Group | National Hospital Ambulatory Medical Care |
| National Hospital Ambulatory Medical Care Survey | National Hospital Cost Data Collection | National Hospital Discharge Survey | National Hospital for Neurology & Neurosurgery | National Hospitality and Parks Association |
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