| NIA | Nanotechnology Industries Association 
| Others |
| NIA | National Imaging Associates
| Others |
| NIA | National Impala Association
| Others |
| NIA | National Indoor Arena
| Others |
| NIA | National Infertility Association
| Others |
| NIA | National Inflation Association
| Others |
| NIA | National Institute of Accountants (Australia)
| Others |
| NIA | National Institute of Aerospace
| Others |
| NIA | National Institute on Aging
| Others |
| NIA | National Insulation Association
| Others |
| NIA | National Insulator Association
| Others |
| NIA | National Integrity Action
| Others |
| NIA | National Intelligence Application
| Others |
| NIA | National Intelligence Authority
| Others |
| NIA | National Investigation Agency
| Intelligence Agency |
| NIA | National Investigation Agency
| Intelligence Agency, Crime |
| NIA | Naturalization of Illegal Aliens
| Others |
| NIA | Net Internal Area
| Others |
| NIA | Netherlands India Association
| Others |
| NIA | Network Indicate Address
| Others |
| NIA | Network Information Access
| Others |
| NIA | Network Infrastructure Administration
| Others |
| NIA | Network Insurance Agent
| Others |
| NIA | Network Interface Adapter
| Others |
| NIA | Neural Impulse Actuator
| Others |
| NIA | Neuromuscular Integrative Action
| Others |
| NIA | Neuromuscular Integrative Activity
| Others |
| NIA | Next Instruction Address
| Others |
| NIA | Nigerian Institute of Architects
| Others |
| NIA | Nigerian Insurers Association
| Others |
| NIA | Nintendo Intelligence Agency
| Others |
| NIA | No Information Available
| Others |
| NIA | No Intensity Assigned
| Others |
| NIA | No Internet Access
| Others |
| NIA | Non Impact Aerobics
| Others |
| NIA | Non Injury Accident
| Others |
| NIA | Not In Archives
| Others |
| NIA | Not Into Aging
| Others |
| NIA | Notation Induction Axioms
| Others |
| NIA | NOVA Interface Adapter
| Others |
| NIA | Number of Inherited Attributes
| Others |
| NIA | Nurturing Intellect And Aspirations
| Others |
| NIA | Nutrient Intake Analysis
| Others |