| NSI | Nail Systems International 
| Others |
| NSI | Name Service Independent
| Others |
| NSI | Name Service Interface
| Others |
| NSI | Nasa Science Internet
| Others |
| NSI | National Science Institute
| Others |
| NSI | National Screen Institute
| Others |
| NSI | National Security Information
| Others |
| NSI | National Security Inspectorate
| Others |
| NSI | National Security Institute
| Others |
| NSI | National Security Intelligence
| Others |
| NSI | National Shipbuilding Initiative
| Others |
| NSI | National Sportswear, Inc.
| Others |
| NSI | National Strategic Indicators
| Others |
| NSI | Nationwide SAR Initiative
| Others |
| NSI | Natural Selection Invitational
| Others |
| NSI | Naval Systems Inc
| Others |
| NSI | Navistar Service Information
| Others |
| NSI | Nearfield Systems Inc
| Others |
| NSI | Negotiated Salary Increase
| Others |
| NSI | Net Sales Income
| Others |
| NSI | Net Spendable Income
| Others |
| NSI | NetScape Interface
| Others |
| NSI | Network For Student Information
| Others |
| NSI | Network Service Interface
| Others |
| NSI | Network Side Interface
| Others |
| NSI | Network Solutions Inc
| Others |
| NSI | Network Solutions Inc.
| Others |
| NSI | Network Solutions Incorporated
| Others |
| NSI | Network Solutions, Inc.
| Others |
| NSI | Network Spread Index
| Others |
| NSI | Network Store Information
| Others |
| NSI | Network Store Interface
| Others |
| NSI | Network System Integrators
| Others |
| NSI | Network System Interface
| Others |
| NSI | Neural Sensory Inducer
| Others |
| NSI | Neurobehavioral Symptom Inventory
| Others |
| NSI | Neurological Society of India
| Others |
| NSI | neuropsychological Symptom Inventory
| Others |
| NSI | Newport, Sammamish, Interlake,
| Others |
| NSI | Next Sequential Instruction
| Others |
| NSI | Next Solutions Inc
| Others |
| NSI | Nexwave Software Infrastructure
| Others |
| NSI | Nitrogen Solubility Index
| Others |
| NSI | No Sign of Infection/Inflammation
| Others |
| NSI | No Smoking Indoors
| Others |
| NSI | Non Sna Interconnection
| Others |
| NSI | Non Standard
| Others |
| NSI | Non Standard Institute
| Others |
| NSI | North Shore Inc
| Others |
| NSI | North South Institute
| Others |
| NSI | Norton System Information
| Others |
| NSI | Not Seriously Injured
| Others |
| NSI | Not So Important
| Others |
| NSI | Nsimalen, Cameroon
| Others |
| NSI | Nuance Systems Inc
| Others |
| NSI | Nullsoft Scriptable Install System
| Others |
| NSI | Numeric System Identifier
| Others |
| NSI | The Neurosciences Institute
| Others |