| Acronym | Definition |
|---|
| NSTA | National Science Teachers Association |
| NSTA | National School Transportation Association |
| NSTA | National Spasmodic Torticollis Association |
| NSTA | National Substitute Teachers Alliance (Fresno, California) |
| NSTA | National Science and Technology Authority |
| NSTA | National Safe Transit Association |
| NSTA | National Science and Technology Awards |
| NSTA | National Security Training Academy |
| NSTA | National Space & Technology Association (Houston, TX) |
| NSTA | Nebraska State Taxidermists Association |
| NSTA | North Shore Times Advertiser (New Zealand newspaper) |
| NSTA | Nova Scotia Tennis Association |
| NSTA | Nippon Steel Trading America (Japan) |
| NSTA | Northern and Southern Taxi Association (South Africa) |