| Acronym | Definition |
|---|
| NSSC➣National School Safety Center |
| NSSC➣Nippon Steel & Sumikin Stainless Steel Corporation (Japan) |
| NSSC➣National Soil Survey Center |
| NSSC➣National Senior Service Corps |
| NSSC➣Naval Sea Systems Command |
| NSSC➣National Strategy to Secure Cyberspace |
| NSSC➣Nippon Steel & Sumikin Chemical (chemical manufacturing company; various locations) |
| NSSC➣NASA Standard Spacecraft Computer |
| NSSC➣National Supply Service Center (Indian Health Service) |
| NSSC➣National Space Science Centre (UK) |
| NSSC➣Nicholas School Student Council (Duke University; North Carolina) |
| NSSC➣Naval Submarine Support Center |
| NSSC➣Nul System Services Corporation (Nihon Unisys, Ltd.) |
| NSSC➣Naval Submarine Support Command |
| NSSC➣Neutral Sulfite Semi-Chemical |
| NSSC➣National Space Studies Center (Air University; Montgomery, AL) |
| NSSC➣Nuclear Security Services Corporation (Willowbrook, IL) |
| NSSC➣Nittetsu Steel Sheet Corporation (Japan) |
| NSSC➣National Syrian Seismological Center |
| NSSC➣NORAD Space Surveillance Center |
| NSSC➣National Secondary Student Council |
| NSSC➣North Suburban Service Council (New Jersey) |
| NSSC➣Naval Sea Support Center |
| NSSC➣Normal Size, Shape, and Consistency |
| NSSC➣National Syndromic Surveillance Conference (diseases) |
| NSSC➣NAVAIR Systems and Software Support Center (Patuxent River, Maryland) |
| NSSC➣Never Self-Synchronizing Code |