| Abbreviation | Definition |
|---|---|
| SPN | Spare Part Number |
| SPN | Switch Panel Network |
| SPOF | Single Point Of Failure |
| SPOFC | Silver Plated Oxygen Free Copper |
| SPORT | Soldier's Portable On-system Repair Tool |
| SPP | Single-Phase Printing |
| SPQ | Standard Pack Quantity |
| SPR | Semiconductor Process Representation |
| SPS | Surface Preparation System |
| SPS | Switching Power Supply |
| SPST | Single Pole Single Throw |
| SPT | Shortest Processing Time |
| SPU | S-band Polar Ultra |
| SPU | Socket Power Unit |
| SPU | Sound Pick Up (microphone) |
| SPU | Stored Power Unit |
| SPV | Surface Photovoltage Spectroscopy |
| SQC | Statistical Quality Control |
| SQP | SQuare Pixel |
| SQPMM | Software Quality and Process Maturity Model |