| Abbreviation | Definition |
|---|---|
| AMS | Atascocita Middle School |
| AMSA | Advanced Math and Science Academy |
| AMSA | Anoka Middle School for the Arts |
| AMSDA | Association of Madison School District Administrators |
| AMSIB | Amsterdam School of International Business |
| AMSO | Amity Middle School Orange |
| AMSS | Alexander Mackenzie Secondary School |
| ANAL | After Noon Angel Land |
| ANCPSS | All Nigeria Confederation of Principals of Secondary Schools |
| ANCPSS | All Nigeria Conference of Principals of Secondary Schools |
| ANGS | Association of Nurses in Graduate School |
| ANHS | Aliso Niguel High School |
| ANHS | Appleton North High School |
| ANMS | All Newton Music School |
| ANPS | Annandale North Public School |
| ANPS | Appollo National Public School |
| ANPS | Ararat North Primary School |
| ANPS | AREVA Nuclear Professional School |
| ANPS | Association of National and Private Schools |
| ANSAA | Arkansas Nonpublic School Accrediting Association |