| Acronym | Definition |
|---|
| NTSA➣Netware Telephony Services Architecture |
| NTSA➣National Training and Simulation Association |
| NTSA➣National Traffic Safety Administration (nonprofit organization) |
| NTSA➣National Tuberous Sclerosis Association |
| NTSA➣National Training Systems Association |
| NTSA➣National Technical Services Association |
| NTSA➣National Target Shotgun Association (UK) |
| NTSA➣North Texas Shooting Academy (Allen, TX) |
| NTSA➣Napthalenetrisulfonic Acid (sulfonic acid) |
| NTSA➣New Talent Singing Awards (annual singing contest) |
| NTSA➣Navy Tactical Support Activity |
| NTSA➣North Texas Speakers Association |
| NTSA➣Naval Telecommunications System Architecture |
| NTSA➣National Trap Shooting Association |
| NTSA➣Not This Stuff Again (polite form) |