| Acronym | Definition |
|---|
| NII➣National Institute of Informatics (Japan) |
| NII➣National Information Infrastructure |
| NII➣Nuclear Installations Inspectorate |
| NII➣Net Interest Income |
| NII➣Networks and Information Integration |
| NII➣National Institute of Informatics |
| NII➣National Institute of Immunology (New Delhi, India) |
| NII➣Net Investment Income |
| NII➣National Insurance Institute (Israel) |
| NII➣Negara Islam Indonesia |
| NII➣National Innovation Initiative |
| NII➣Non Intrusive Inspection |
| NII➣Network Intelligence India Pvt Ltd |
| NII➣Non-Intrusive Imaging (security) |
| NII➣National Investment Institute (Australia) |
| NII➣Negative Impedance Inverter (electrical engineering) |
| NII➣Non Intrusive Instrumentation (research; various organizations) |
| NII➣National Implementation Issue |
| NII➣Non-Ideal Interleaving |
| NII➣National Informatization Index (South Korea) |
| NII➣National Immigration Institute |
| NII➣National Income Inquiry |