- Radial Basis Function
- Random Access Memory
- Random Forests
- Random Walks
- Rate
- Raw Corpus
- Real Time
- Recognition
- Recognition and Classification
- Recursion
- Refutation
- Regression Analysis
- Reinforcement Learning
- Relative Voltage
- Respirometer
- Rhetoric Disambiguation
- Robot
- Robotics
- Romanization of Arabic
- Rooting
- Roots
- Rule-Based Machine Learning
- Runtime