| Rank | Abbreviation | Meaning |
|---|
| ***** | SSDT | System Service Descriptor Table
| |
| **** | SSDT | Secondary System Description Table
| |
| *** | SSDT | State Software Development Team
| |
| *** | SSDT | Safety Sensitive Drug Testing
| |
| *** | SSDT | SQL (Structured Query Language) Server Data Tools
| |
| *** | SSDT | Scottish Six Day Trial
| |
| *** | SSDT | Site Selection Diversity Transmission
| |
| ** | SSDT | Security System Development Team
| |
| ** | SSDT | Spoofed Secure Data Transfer
| |
| ** | SSDT | Simultaneous Sensing and Data Transmission
| |
| ** | SSDT | Sim Safe Driver Training
| |
| * | SSDT | Site Selection Diversity Transmit
| |
| * | SSDT | Shanghai Superior Die Technology
| |
| * | SSDT | Semiconductor Systems Design Technology
| |
| * | SSDT | South Shore Drill Team
| |
| * | SSDT | System Services Descriptor Table
| |
| * | SSDT | Society of Soft Drink Technologists
| |
| * | SSDT | System Service Dispatch Table
| |
| * | SSDT | Septic System Design Testing
| |
| * | SSDT | Scottish Solicitors Discipline Tribunal
| |
| * | SSDT | Sasha Soreff Dance Theater
| |
| * | SSDT | Sea Surface Dynamic Topography
| |
| * | SSDT | School of Sustainable Development and Tourism
| |
| * | SSDT | Swiss Snow Demo Team
| |
| * | SSDT | Semi Submersible Drilling Tender
| |