| NASS | Nas Solution 
| Others |
| NASS | National Accident Sampling System
| Others |
| NASS | National Adventure Sports Show
| Others |
| NASS | National Agricultural Statistical Service
| Others |
| NASS | National Agricultural Statistics Service
| Others |
| NASS | National Agriculture Statistics Service
| Others |
| NASS | National Air and Surface System
| Others |
| NASS | National Ankylosing Spondylitis Society
| Others |
| NASS | National ART Surveillance System
| Others |
| NASS | National Association of School Superintendents
| Others |
| NASS | National Association of Secretaries of State
| Others |
| NASS | National Association of Stable Staff
| Others |
| NASS | National Association of Street Schools
| Others |
| NASS | National Asylum Seekers Service
| Others |
| NASS | National Asylum Support Service
| Others |
| NASS | National Asylum Support Services
| Others |
| NASS | National Automotive Sampling System
| Others |
| NASS | Native American Student Services
| Others |
| NASS | Naughty Aardvarks Shear Sheep
| Others |
| NASS | Naval Academy Sailing Squadron
| Others |
| NASS | Naval Academy Summer Seminar
| Others |
| NASS | Network Access Signalling System
| Others |
| NASS | Network Attachment Sub-System
| Others |
| NASS | Network Attachment Subsystem
| Others |
| NASS | Ngee Ann Secondary School
| Others |
| NASS | Nonlinear Analysis for Spatial Structures
| Others |
| NASS | North American Schelling Society
| Others |
| NASS | North American Spine Society
| Others |
| NASS | North American Spitfire Squadron
| Others |
| NASS | North American Squirrel Society
| Others |
| NASS | North American Standard Specification
| Others |
| NASS | North American Strongman Society
| Others |
| NASS | North American Substation Services
| Others |
| NASS | North American Sundial Society
| Others |
| NASS | North Atlantic Sightings Survey
| Others |
| NASS | Not A Single Semiconductor
| Others |