NMI
- Church of the Nazarene
- Creditcall
- IBM i
- NMI (gene)
- NMI Mobility
- NRO Management Information System
- National Measurement Institute
- National Museum of Indonesia
- National Museum of Ireland
- Nautical mile
- Navi Mumbai International Airport
- Nelson Mandela Institution
- New Mexico Airlines
- Nissan Motor Indonesia
- No middle initial
- Non-maskable interrupt
- Nonprofit Marketplace Initiative
- Northern Mariana Islands
- Nyam language