| Term | Full Form | Category |
|---|---|---|
| STLS | S for Transport Layer Security | Others |
| STLS | Senior Tuberculosis Laboratory Supervisor | Others |
| STLS | South Texas Library System | Others |
| STLS | Southern Tier Legal Services | Others |
| STLS | Southern Tier Library System | Others |
| STLS | Specified Transfer Listing Service | Others |
| STLS | St Thomas Lutheran School | Others |
| STLS | Students in Temporary Living Situations | Others |