| Rank | Abbreviation | Meaning |
|---|
| ***** | TCSS | Thomson-CSF Semiconducteurs Specifiques SA
| |
| ***** | TCSS | TradeCard Settlement Services, LLC
| |
| ***** | TCSS | Text Covering with Strings Subset
| |
| ***** | TCSS | Two-Chamber Space Suit
| |
| *** | TCSS | Talk Cock Sing Song
| |
| ** | TCSS | Taiwan Chinese Student Society
| |
| ** | TCSS | Traffic Control and Surveillance Systems
| |
| * | TCSS | The Custom Saber Shop
| |
| * | TCSS | Toronto Clinical Scoring System
| |
| * | TCSS | Traffic Capture Subsystem
| |
| * | TCSS | Trend Micro Certified Sales Specialist
| |
| * | TCSS | Torpedo Control System, Submarine
| |
| * | TCSS | Total Communications Systems & Solutions, Inc.
| |
| * | TCSS | Tucson Cactus Succulent Society
| |
| * | TCSS | Traffic Control Switching Set
| |
| * | TCSS | Telecommunications Service System
| |
| * | TCSS | Troup County School System
| |
| * | TCSS | Total Control Security and Call Accounting Server
| |
| * | TCSS | Tuscaloosa County School System
| |
| * | TCSS | Traction Control Support System
| |
| * | TCSS | Telecommunications Systems Standards
| |
| * | TCSS | The CyberSeekers Society
| |
| * | TCSS | Tennessee Council for the Social Studies
| |
| * | TCSS | Tasmanian Collie & Shetland Sheepdog club
| |
| * | TCSS | Time-table Creation Support System
| |