| STDI | Science and Technology Diplomacy Initiative 
| Others |
| STDI | Short Term Disability Insurance
| Others |
| STDI | Single Toyota Direct Injection
| Others |
| STDI | Small Town Design Initiative
| Others |
| STDI | Solutions Techniques Didactiques et Innovantes
| Others |
| STDI | Southwest Technology Development Institute
| Others |
| STDI | Spatio Temporal Depth Interpolation
| Others |
| STDI | Special Technical Development Investigation
| Others |
| STDI | Stereo Tube Direct Interface
| Others |
| STDI | Structural Time Domain Identification
| Others |
| STDI | Sustainable Tourism Development Index
| Others |
| STDI | Synthetic Training Device Instructor
| Others |
| STDI | Synthetic Training Device Instructors
| Others |
| STDI | System Transform and Development Initiative
| Others |