| Abbreviation | Definition |
|---|---|
| NICS | National Institute for Chemical Studies |
| NICS | National Institute for Computational Sciences |
| NICUS | Nutrition Information Centre of the University of Stellenbosch |
| NIDS | Network Intrusion Detection System |
| NIET | National Institute of Engineering & Technology |
| NIFT | National Institute of Fashion Technology |
| NIHS | Nopany Institute of Healthcare Studies |
| NIJ | Nigerian Institute of Journalism |
| NIJD | National Institute Of Jewellery Design |
| NIME | National Institute of Mechatronics Engineering |
| NIP | Netherlands Institute For Psychologists |
| NIP | Northern Ireland Polytechnic |
| NIPA | National Institute of Public Administration |
| NIPER | National Institute of Pharmaceutical Education and Research |
| NIPM | National Institute of Personnel Management |
| NIRA | National Institute for Research Advancement |
| NIRA | National Intercollegiate Rodeo Association |
| NIS | Nazarbayev Intellectual School (Kazakhstan) |
| NISS | National Institute of Statistical Sciences |
| NIST | National Institute of Science and Technology (India) |