| NIS | Na I Symporter 
| Others |
| NIS | Naftna industrija Srbije
| Others |
| NIS | Nagoya International School
| Others |
| NIS | Names Information Socket
| Others |
| NIS | Namo Image Slicer
| Others |
| NIS | Nanotech Industrial Solutions
| Others |
| NIS | National Ideal School
| Others |
| NIS | National Identification Service
| Others |
| NIS | National Identity Services
| Others |
| NIS | National Immunization Survey
| Others |
| NIS | National Immunization Surveys
| Others |
| NIS | National Impatient Sample
| Others |
| NIS | National In-patient Sample
| Others |
| NIS | National Incidence Study
| Others |
| NIS | National Information Sector
| Others |
| NIS | National Information System
| Others |
| NIS | National Inmate Survey
| Others |
| NIS | National Inpatient Sample
| Others |
| NIS | National Institute of Sports
| Others |
| NIS | National Institute of Statistics
| Others |
| NIS | National Insurance Scheme
| Others |
| NIS | National integrity system
| Others |
| NIS | National Intelligence Service
| Others |
| NIS | National Irrigation System
| Others |
| NIS | Nationwide Inpatient Sample
| Others |
| NIS | Naval Investigative Service
| Others |
| NIS | Nazarbayev Intellectual School (Kazakhstan)
| Others |
| NIS | Nazarbayev Intellectual Schools
| Others |
| NIS | Neighborhood Improvement Specialist
| Others |
| NIS | Neighborhood Information System
| Others |
| NIS | Network and Information Security
| Others |
| NIS | Network And Information Systems
| Others |
| NIS | Network Imaging Solutions, Inc.
| Others |
| NIS | Network Incentive Scheme
| Others |
| NIS | Network Information Service
| Others |
| NIS | Network Information Services
| Others |
| NIS | Network Information System
| Others |
| NIS | Network Information Systems
| Others |
| NIS | Network Infrastructure and Security
| Others |
| NIS | Network Infrastructure Services
| Others |
| NIS | Network Infrastructure Solutions
| Others |
| NIS | Network Inspection Service
| Others |
| NIS | Network Installation Specialists
| Others |
| NIS | Network Integration Services
| Others |
| NIS | Network Integrity Systems
| Others |
| NIS | Network Interconnection Service
| Others |
| NIS | Network Interpreting Service
| Others |
| NIS | Network Interpreting Service, Inc.
| Others |
| NIS | Neurological Integration System
| Others |
| NIS | New Immigrant Survey
| Others |
| NIS | New In Shrink
| Others |
| NIS | New Interdisciplinary School
| Others |
| NIS | New Israeli Shekel
| Others |
| NIS | new Israeli sheqel
| Others |
| NIS | Newly Independent States
| Others |
| NIS | Newsroom Information Solution
| Others |
| NIS | Nigeria Immigration Service
| Others |
| NIS | Nigerian Industrial Standard
| Others |
| NIS | Nippon Ichi Software
| Others |
| NIS | Nissan
| Others |
| NIS | NMCS (National Military Command System) Information System
| Others |
| NIS | Non Interactive Sequence
| Others |
| NIS | Non Investigative Subject
| Others |
| NIS | Non-Imaging Sensor
| Others |
| NIS | Nonverbal Immediacy Scale
| Others |
| NIS | Nordic Integrated System
| Others |
| NIS | Normal Insulating and Superconducting
| Others |
| NIS | Northern Illinois Streeters
| Others |
| NIS | Northpointe Intermediate School
| Others |
| NIS | Norton Internet Security
| Others |
| NIS | Nortons Internet Security
| Others |
| NIS | Norwegian International Shipping
| Others |
| NIS | Norwegians In Space
| Others |
| NIS | Not In Service
| Others |
| NIS | Not In Shankar
| Others |
| NIS | Not In Stock
| Others |
| NIS | Not In Store
| Others |
| NIS | Not In the Stacks
| Others |
| NIS | Nothing Incredibly Special
| Others |
| NIS | Nothing Is Safe
| Others |
| NIS | Numerical Integration Subroutine
| Others |
| NIS | Sodium-Iodide Symporter
| Others |