- Armadillo
- Array Computing
- Artificial Neural Network
- Association
- Association Mapping
- Association Measure
- Association Rules
- Astronomy
- Asymmetric Factor Model
- Atlas
- Attribute Scoring
- Attribute Selecti
- Attribute Selection
- Audio
- Auto Encoder
- Automata Learning
- Automated Parameter Tuning
- Automatic Differentiation
- Backpropagation
- Bag Of Features