| Abbreviation | Definition |
|---|---|
| SLIC | ERNO Spacelab Integration and Test |
| SLIP | Serial Line Internet Protocol |
| SLL | Shift Left Logical |
| SLL | Super Lightweight Interchangeable Carrier |
| SLM | Simulated Laboratory Module |
| SLN | ERNO Spacelab Payload |
| SLN | Superior Laryngeal Nerve |
| SLO | ERNO Spacelab Operations |
| SLP | Set Loop Point |
| SLP | Speech Language Pathologist |
| SLP | Solar Lunar Planetary |
| SLP | ERNO Spacelab Program Office |
| SLPB | Spacelab Program Board |
| SLQ | Shift Left with MQ |
| SLR | Satutory Liquidity Ratio |
| SLR | Statutory Liquidity Ratio |
| SLR | Single Lens Reflex |
| SLR | Satellite Laser Ranging |
| SLR | Sea-level Rise |
| SLR | Scalable Linear Recording |
| SLR | Special Limited Reserve |
| SLR | Self Loading Rifle |
| SLR | Smells Like Records |
| SLR | Service Level Reporter |
| SLR | Sport Light Racing |
| SLR | Steam Lock Release |
| SLR | Synthetic Lipid Remover |
| SLR | Self Limiting Ration |
| SLR | Stealing Left Right |
| SLR | Supplement Labeling Revision |
| SLR | Student Late Receipt |
| SLRV | Shuttle Launched Research Vehicle |
| SLS | Spacelab Simulator |
| SLS | Spacelab Life Sciences |
| SLS | Sortie Lab Simulator |
| SLS | Secondary Landing Site |
| SLSA | Shuttle Logistics Support Aircraft |
| SLSMS | Spacelab Support Module Simulator |
| SLT | ERNO Spacelab Technology |
| SLV | Satellite Launch Vehicle |
| SLV | Space Launch Vehicle |
| SLW | Shift Left Word |
| SLZ | Shift Left Zero |
| SM | Simple Mainloop |
| SM | Shell Model |
| SM&S | Systems Management and Sequencing |
| SM/PM | System Management/Performance Monitor |
| SMA | Secondary Mirror Assembly |
| SMA | Science Monitoring Area |
| SMA | Subject Matter Area |