| Acronym | Definition |
|---|
| TSPI | Time-Space-Position Information |
| TSPI | Thames Society of Paranormal Investigations (Connecticut) |
| TSPI | Telephony Service Provider Interface |
| TSPI | Tulay Sa Pag-Unlad, Inc. |
| TSPI | To Complete Schedule Performance Indicator (project management) |
| TSPI | Introductory Team Software Process (Software Engineering Institute) |
| TSPI | Technology Service Partners, Inc. |
| TSPI | Tactical Solution Partners, Inc. (UK) |
| TSPI | Training, Simulation and Performance Improvement |
| TSPI | Toe Systolic blood Pressure Index |
| TSPI | Tomsk State Pedagogical Institute (Hungary) |
| TSPI | Tsukiden Software Philippines, Inc. (Pasig City, Philippines) |
| TSPI | Temporal Speckle Pattern Interferometry |
| TSPI | Tribal Sovereignty Protection Initiative |
| TSPI | Telecommunication Services Price Index |
| TSPI | Transaction Service Provider Interface |
| TSPI | Time-bound Self-Purging Indicator |
| TSPI | Temperate Sorter Preference Indicator |
| TSPI | Topeka Storage Pool, Inc. |
| TSPI | Total Suspended Particulate Inlet |