| Abbreviation | Definition |
|---|---|
| RAP | Residual Analysis Program |
| RAT | Rational Choice Theory |
| RAT | Reflex Angle Theorem |
| RAT | Regression Analysis Tool |
| RAT | Right Angled Triangle |
| RAV | Reparameterized Angle Variation |
| RBC | Reflecting Boundary Conditions |
| RBF | Radial Basis Function |
| RBN | Random Boolean Network |
| RBO | Rule Based Optimizer |
| Rc | Radius of Curvature |
| RC | Range of Criteria |
| RCA | Recursive Comprehension Axiom |
| RCA | Root Cause Analysis |
| RCC | Region Connection Calculus |
| RCEM | Reproducibility in Computational and Experimental Mathematics |
| RCI | Relevance Category I |
| RCII | Relevance Category II |
| RCM | Reverse Cuthill-McKee |
| RCM | Risk and Control Matrix |