| Abbreviation | Definition |
|---|---|
| SLMB | Submarine Launched Ballistic Missiles |
| SLME | Select Manual Entry |
| SLMM | Sri Lanka Monitoring Mission |
| SLMM | Submarine Launched Mobile Mine |
| SLN | Sri Lanka Navy |
| SLO | Space Liaison Officer |
| SLOC | Sea Lines Of Communications |
| SLOC | Source Lines Of Code |
| SLOW | Special Lowbandwith Operating Weapon |
| SLP | Seaward Launch Point |
| SLPE | System- Level Practical Exercise |
| SLPE | System-Level Practical Exercise |
| SLQ | Electronic Warfare System |
| SLQ-25 | Torpedo Countermeasures System |
| SLQ-31 | Electronic Warfare Jamming System |
| SLQ-32 | Electronic Warfare Jamming System |
| SLQ-48 | Mine Neutralization System |
| SLR | Self Limiting Ration |
| SLR | Self Loading Rifle |
| SLR | Special Limited Reserve |