| Abbreviation | Definition |
|---|---|
| SOT | Second Order Tensor |
| SOTP | Sum Of The Parts |
| SPA | Stochastic Process Algebra |
| SPB | Simple PayBack |
| SPC | Statistical Process Control |
| SPD | Symmetric Positive Definite |
| SPD | Symmetric Positive Definite Matrices |
| SPD | Symmetric Positive Definite matrix |
| SPDE | Sampling Point Data Entry |
| SPDE | Stochastic Partial Differential Equation |
| SPF | Shortest Path First |
| SPH | Spherical |
| SPI | S Polynomial Information |
| SPI | Semantics, Proof, and Implementation |
| SPL | Steep Power Law |
| SPM | Statistical Parametric Mapping |
| SPN | Simplest Possible Number |
| SPR | Strict Positive Realness |
| SPR | Subtree Prune and Re-graft |
| SPRT | Sequential Probability Ratio Test |