| Abbreviation | Definition |
|---|---|
| SL | SYSCON (System Control) Lightweight computer unit |
| SL | System Layer |
| SL3 | Stock list Level 3 |
| SLA | Sri Lanka Army |
| SLA | Strategic Logistics Agency |
| SLAC | Support List Allocation Card |
| SLAD | SPOD (Sea Port Of Debarkation) Latest Arrival Date |
| SLAD | Survivability and Lethality Analysis Directorate |
| SLAF | Sri Lanka Air Force |
| SLAF | Sri Lanka Armed Forces |
| SLAM | Simultaneous Localization and Mapping |
| SLAM | STACCS LAN Management System |
| SLAM | Standoff Land Attack Missile |
| SLAM | Stand-off Land Attack Missile |
| SLAM | Super Logistical Annihilation Maneuvers |
| SLAMRAAM | Surface Launched Advanced Medium Range Air to Air Missile |
| SLAOC | Sri Lanka Army Ordnance Corps |
| SLAP | Saboted Light Armor Penetrator |
| SLAP | Saboted Light Armour Penetrating |
| SLAR | Side- Looking Airborne Radar |