| Abbreviation | Definition |
|---|---|
| ABF | All But a Finite |
| ABS | Absolute |
| AC | 'A' Complement |
| AC | Added Constraint |
| AC | Addressing Circuit |
| AC | Arc Consistency |
| AC | Assumption Context |
| AC | Axiom of Choice |
| ACA | Adaptive Conjoint Analysis |
| ACA | Arithmetic Comprehension Axiom |
| ACBEDS | AXeup |
| ACC | Adaptive Combinations of Classifiers |
| ACC | Ascending Chain Condition |
| ACE | Advanced Coset Enumerator |
| ACE | Ambient Computational Environment |
| ACE | Analyzing Combination Effects |
| ACELP | Algebraic Code Excited Linear Prediction |
| ACHR | Axiomatic Combinatorial Hamiltonian Recursive |
| ACIP | Absolutely Continuous Invariant Probability |
| ACM | Alternative Calculation Method |