| Abbreviation | Definition |
|---|---|
| NATA | National Athletic Trainers Association |
| NATA | National Athletic Trainers' Association |
| NATA | National Athletic Trainers Assossiation |
| NATABOC | National Athletic Trainers Association Board of Certification |
| NATM | National Athletic Training Month |
| NATP | National Athletic Testing Program |
| NATS | National Athletic Testing System |
| NBAA | New Berlin Athletic Association |
| NBAA | North Bay Athletic Association |
| NBAC | Newport Beach Athletic Club |
| NBAS | New Balance Athletic Shoe |
| NCAA | National Coalition of Athletics and Academics |
| NCAA | National Collegiate Athletic Association |
| NCAA | National Collegiate Athletics Association |
| NCAAM | National Collegiate Athletic Association - Men |
| NCAAM | National Collegiate Athletic Association Men |
| NCAAW | National Collegiate Athletic Association - Women |
| NCAC | North Cascades Athletic Club |
| NCAC | North Coast Athletic Conference |
| NCAC | Northern California Athletic Conference |