| Acronym | Definition |
|---|
| NSSA➣Not So Stubby Area (OSPF routing) |
| NSSA➣not so Stubby Area |
| NSSA➣National Scholastic Surfing Association |
| NSSA➣National Skeet Shooting Association |
| NSSA➣National Storm Shelter Association |
| NSSA➣National Sportscasters and Sportswriters Association |
| NSSA➣National Space Society of Australia |
| NSSA➣Nova Scotia Snowboard Association (Canada) |
| NSSA➣National Security Space Architect |
| NSSA➣North-South Skirmish Association, Inc. |
| NSSA➣National Social Science Association |
| NSSA➣Norfolk Schools Sailing Association (UK) |
| NSSA➣National Show Ski Association |
| NSSA➣Nova Scotia Salmon Association |
| NSSA➣National Schools Sailing Association |
| NSSA➣National Swim School Association |
| NSSA➣National Safe Skies Alliance |
| NSSA➣National Sjogren's Syndrome Association |
| NSSA➣Nebraska State Soccer Association |
| NSSA➣National Sample Survey of Agriculture |
| NSSA➣National Skating Suppliers Association |
| NSSA➣Northeast States Sign Association |
| NSSA➣National Sunday School Association |
| NSSA➣Nebraska State Snowmobile Association |
| NSSA➣Nebraska Shooting Sports Association |
| NSSA➣Navy Space Systems Activity |
| NSSA➣National Suffolk Sheep Association |
| NSSA➣Network Services Security Administration |
| NSSA➣Norwegian Social Security Agency |
| NSSA➣Network for Sub-Saharan Africa |
| NSSA➣National Security Space Acquisition |
| NSSA➣Norfolk Ship Support Activity (US Navy) |
| NSSA➣Nippon Steel Southeast Asia Pte. Ltd. (Singapore) |