| NA |
| Name | Number of records |
| Naked Under My Clothes | 137 |
| Nancy Hall, Inc. | 326 |
| Narada Productions, Inc. | 442 |
| Nara Music, Inc. | 222 |
| Narcotics Anonymous World Services, Inc. | 493 |
| Nashvistaville Songs | 207 |
| National Academy of Sciences | 2534 |
| National Board for Professional Teaching Standards | 421 |
| National Board of Medical Examiners | 731 |
| National Board of Professional Teaching Standards | 189 |
| National Broadcasting Company | 134 |
| National Broadcasting Company, Inc. | 8347 |
| National Broadcasting Company Studios, Inc. | 1037 |
| National Bureau of Economic Research | 254 |
| National Business Institute, Inc. | 270 |
| National Cable Television Institute | 465 |
| National Center for Construction Education and Research | 331 |
| National Child Safety Council | 728 |
| National Council of Teachers of English | 810 |
| National Council on Compensation Insurance, Inc. | 2972 |
| National Educational Video, Inc. | 484 |
| National Education Corporation | 778 |
| National Education Training Group, Inc. | 554 |
| National Electrical Manufacturers Association | 782 |
| National Film Board of Canada | 555 |
| National Fire Protection Association | 1980 |
| National Geographic Society | 3038 |
| National Geographic Television | 707 |
| National Library of Poetry | 199 |
| National Occupational Competency Testing Institute | 386 |
| National Philharmonic Orchestra | 98 |
| National Radio Institute | 334 |
| National Safety Council | 1087 |
| National Textbook Company | 1330 |
| National Underwriter Company | 598 |
| Nation Music | 310 |
| Nazarene Publishing House | 705 |
| Nazarene Publishing House. | 205 |
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