| Rank | Abbreviation | Meaning |
|---|
| ***** | SLSS | Substation Line Sharing Switch
| |
| ***** | SLSS | Stephen Lewis Secondary School (Thornhill, ON, Canada)
| |
| ***** | SLSS | Single Layer, Single Sided (DVD)
| |
| ***** | SLSS | Singapore Life Saving Society
| |
| ***** | SLSS | Single Layer, Single Sided
| |
| **** | SLSS | Surf Life Saving Services
| |
| **** | SLSS | Super Live Surround Sound
| |
| **** | SLSS | System Library Subscription Service
| |
| **** | SLSS | SUSE Linux Standard Server
| |
| **** | SLSS | Students' Life Satisfaction Scale
| |
| **** | SLSS | Spacelab Subsystem
| |
| **** | SLSS | Service Level Specifications
| |
| **** | SLSS | Sound Level Sensor System
| |
| *** | SLSS | Second Level Support Services
| |
| *** | SLSS | Surf Life Saving Sydney (Little Bay, New South Wales, Australia)
| |
| *** | SLSS | Student Learning and Support Services
| |
| *** | SLSS | Secondary Life Support System
| |
| *** | SLSS | Student Learning Support Service
| |
| *** | SLSS | Supplemental Loans for Students
| |
| *** | SLSS | Steveston-London Secondary School (Richmond, British Columbia, Canada)
| |
| *** | SLSS | Shuttle Launch Support System
| |
| ** | SLSS | Student Loan Servicing System
| |
| ** | SLSS | Surf Life Saving Sydney
| |
| ** | SLSS | Si Ling Secondary School
| |
| ** | SLSS | Schools Library Services
| |