| Abbreviation | Definition |
|---|---|
| AMSP | Association of Microsoft Solution Providers |
| AMSS | Academy of Mathematics and Systems Science |
| AMTI | Association of Mathematics Teachers of India |
| AMTNYS | Association of Mathematics Teachers of New York State |
| AN | Asymptotically Normal |
| ANAGRAMS | Antwerp Algebraic Geometry, Rings and More Seminar |
| ANCOVA | Analysis Of Covariance |
| AND | logical AND |
| ANF | Abstract Normal Form |
| ANF | Algebraic Normal Form |
| ANR | Absolute Neighborhood Retract |
| AOA | AIMMS Outer Approximation algorithm |
| AOC | Algebra Of Continuity |
| AOC | Approximate Original Contour |
| AoCMM | Association of Computational and Mathematical Modeling |
| AOD | Application Of Derivatives |
| AOR | adjusted odds ratio |
| AOSM | Atmosphere Ocean Science and Mathematics |
| AP | Additional Problem |
| AP | Arithmetic Progression |