| Abbreviation | Definition |
|---|---|
| NCH | National ClearingHouse |
| NCH | National Committee on Housing |
| NCH | National Council on the Humanities |
| NCHC | National Center for High-Performance Computing |
| NCHE | National Committee on Household Employment |
| NCHELP | National Council of Higher Education Loan Programs |
| NCHHSTP | National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention |
| NCHR | National Commission Of Human Rights |
| NCHS | National Committee on Homemaker Service |
| NCHSD | National Consortium for Health Systems Development |
| NCHSR&D | National Center for Health Services Research and Development |
| NCHSRD | National Center for Health Services Research and Development |
| NCI | National Computational Infrastructure |
| NCI | Nuclear Control Institute, Washington, DC |
| NCIE | Notices of Claimed Investigational Exemption for a New Animal Drug |
| NCIP | national committees for immunization practices |
| NCIRD | National Center for Immunization and Respiratory Diseases |
| NCIS | New Cadre Integrated Scientists |
| NCISP | National Criminal Intelligence Sharing Plan |
| NCIV | National Council for International Visitors |