| Acronym | Meaning |
| SIT | Safety Improvement Team (various locations) |
| SIT | Safety Injection Tank |
| SIT | Satellite Inspector Target |
| SIT | Select in Test |
| SIT | Shuttle Interface Test (US NASA) |
| SIT | Silicon Intensified Target |
| SIT | Site Improvement Team |
| SIT | Site Integration Test |
| SIT | Situation |
| SIT | Situation Reporting System |
| SIT | Slovenian Tolar (currency code) |
| SIT | Software/Hardware Integration |
| SIT | Spaceborne Infrared Tracker |
| SIT | Spacecraft Interface Test |
| SIT | Special Interest Target (US DoD) |
| SIT | Special Investigation Team (India) |
| SIT | Squadron Integration Training (US DoD) |
| SIT | State Income Tax |
| SIT | Stationary Infantry Target (US Army training) |
| SIT | Stock in Transit |
| SIT | Super Intendencia de Telecomunicaciones (Guatemala Central America) |
| SIT | Superintendecia de Telecomunicaciones (Guatemala Central America) |
| SIT | Surface Interval Time (SCUBA) |
| SIT | System Implementation Team (NASA) |
| SIT | System Integration Team |
| SIT | Système d'Information Territorial (French: Territorial Information System) |
| SIT | Système Intelligent de Transport (French: Intelligent Transpiration System; Canada) |