| Abbreviation | Definition |
|---|---|
| SPU | Special Port Unit |
| SPU | SPecialist, Utility (Women's Reserve) |
| SPU | Sub-surface Propulsion Unit |
| SPUD | Potato |
| SPUD | Stored Program Universal Demonstrator |
| SPURV | Self- Propelled Underwater Research Vehicle |
| SPV | Sound, Picture, And Video |
| SPW | Semi Precious Weapons |
| SPW | Special Purpose Weapon |
| SPW | Systematic Programming Workshop |
| SPZ | Spetsnaz |
| SQ | Super Quiet |
| SQA | Software Quality Assurance |
| SQAM | Software Quality Assurance Management |
| SQAP | Software Quality Assurance Plan |
| SQB | Software Quality Benchmark |
| SQB | Software Quality Board |
| SQD | Software Quality Data |
| SQD | Squad |
| SQD | Squadron |