| NPTA | National Congress of Parent and Teacher's Association 
| Others |
| NPTA | National Paper Trade Association
| Others |
| NPTA | National Parent Teacher Association
| Others |
| NPTA | National Pest Technicians Association
| Others |
| NPTA | National Pharmacy Technician Association
| Others |
| NPTA | National Piano Travelers Association
| Others |
| NPTA | National Police and Troopers Association
| Others |
| NPTA | National Postal Transport Association
| Others |
| NPTA | National Procurement Tender Administration
| Others |
| NPTA | National Progressive Taekwondo Association
| Others |
| NPTA | National Property Taxpayers Association
| Others |
| NPTA | Nebraska Physical Therapy Association
| Others |
| NPTA | Nevada Physical Therapy Association
| Others |