| NASI | Nachurs Alpine Solutions Industrial 
| Others |
| NASI | National Academy of Sciences India
| Others |
| NASI | National Academy of Social Insurance
| Others |
| NASI | National Air and Stream Improvement
| Others |
| NASI | National Association of Systems Integrators
| Others |
| NASI | National Audubon Society, Inc.
| Others |
| NASI | National Automatic Sprinkler Industry
| Others |
| NASI | Native American Scholars
| Others |
| NASI | Native American Scholars Initiative
| Others |
| NASI | Naval Aircraft and Ship Instrumentation
| Others |
| NASI | Netware Access Server Interface
| Others |
| NASI | Netware Asynchronous Service Interface
| Others |
| NASI | Netware Asynchronous Support Interface
| Others |
| NASI | Netware Asynchronous Systems Interface
| Others |
| NASI | Noise Assessment Solutions Iac
| Others |
| NASI | Noise Assessments Solutions Iac
| Others |
| NASI | North American Scientific Inc
| Others |
| NASI | North American Series I
| Others |
| NASI | North American Systems International
| Others |