TSSI
| Acronym | Definition |
|---|---|
| TSSI | Temporal Single-System Interpretation (Marxist theory) |
| TSSI | Time Slot Sequence Integrity |
| TSSI | Transmitter Signal Strength Indication |
| TSSI | Tactical and Survival Specialties Inc. (Harrisonburg, VA) |
| TSSI | Total Solution System Integrator Sdn Bhd. (Selangor Darul Ehsan, Malaysia) |
| TSSI | Top Secret Special Intelligence |