| Abbreviation | Definition |
|---|---|
| SPTR | Scottish Physics Teaching Resources |
| SPU | Single Particle Unit |
| SQ | Scalar Quantization |
| SQK | Sub- Quantum Kinetics |
| SQM | SQuare Meter |
| SQM | Super Quantum Mechanics |
| SQW | Single Quantum Well |
| SR | Special Relativity |
| SR | Surface Representation |
| SRBM | Semimartingale Reflecting Brownian Motion |
| SRF | Structural Reinforcement Field |
| SRI | Slope Rising In .... |
| SRL | Structural Return Loss |
| SRO | Short Range Order |
| SRT | Stress Relief, and Tensioning |
| SRV | Safety Relief Valve |
| SS | Secondary Structure |
| SS | Short Stress |
| SS | Spectral Subtraction |
| SSADM | Structured System Analysis and Design Methodology |