| Acronym | Definition |
|---|
| MSTA | Missouri State Teachers Association |
| MSTA | Michigan Science Teachers Association |
| MSTA | Moorish Science Temple of America |
| MSTA | Maryland State Teachers Association |
| MSTA | Mumps Skin Test Antigen |
| MSTA | Montana Science Teachers Association |
| MSTA | Maine Science Teachers Association |
| MSTA | Motorcycle Sport Touring Association (est. 1982) |
| MSTA | Math Science and Technology Academy |
| MSTA | Moore Stephens Technology Australia |
| MSTA | Must See To Appreciate |
| MSTA | Mid State Trail Association (Pennsylvania) |
| MSTA | Math/Science/Technology Academy |
| MSTA | Michigan Septic Tank Association |
| MStA | Multiple Structural Alignments |
| MSTA | Mathematical Statistics |
| MSTA | Master Status |
| MSTA | Midwest Speech Technology Association |
| MSTA | Mississippi Science Teacher's Association |
| MSTA | Michigan State Teachers Association |
| MSTA | Mathematics, Science, and Technology Academy |
| MSTA | Multiparticle Spacetime Algebra |
| MSTA | Main Street Tourism Association (Fayetteville, Georgia) |
| MSTA | Math, Science, Technology Academies |
| MSTA | Multiple Semester Term Appointments |
| MSTA | Metering Statistics |
| MSTA | Michigan Small Tech Association |
| MSTA | Milwaukee Substitute Teachers' Association |
| MSTA | Montana State Trapshooting Association |
| MSTA | Multi Sensor Track Association |
| MSTA | Marine Science and Technologies Advisory |
| MSTA | Mission Support Training Activities |
| MSTA | Montana Seed Trade Association |
| MSTA | Mission Services Training Activities |
| MSTA | Masjid Schools Teachers Association (India) |
| MSTA | Maine State Teachers Association |
| MSTA | Mejoramiento de la Salud del Trabajador Agricola |
| MSTA | Multi-Sensor Target Acquisition |
| MSTA | Materials and Structures Technology Area |
| MSTA | Multi-State Tax Analyzer |