| Acronym | Definition |
|---|
| STM | Synchronous Transfer Mode |
| STM | Sosiaali- ja Terveysministeriö (Finnish: Ministry of Social Affairs and Health; Helsinki) |
| STM | Seems To Me |
| STM | Scanning Tunneling Microscopy |
| STM | Master of Sacred Theology |
| STM | Scanning Tunneling Microscope |
| STM | Scientific, Technical and Medical (International Association of) |
| STM | Societe de Transport de Montreal |
| STM | SPIE (Source Path Isolation Engine) Traceback Manager |
| STM | Short Term Memory |
| STM | Software Transactional Memory |
| STM | Synchronous Transport Module |
| STM | Scientific, Technical and Medical Publishers |
| STM | Store Multiple (IBM) |
| STM | Superior Tribunal Militar (Brazil) |
| STM | Signature Tagged Mutagenesis |
| STM | Science-Technical-Medical |
| STM | School of Tropical Medicine |
| STM | Short Term Mission |
| STM | Said Too Much |
| STM | Sympto-Thermal Method (natural family planning) |
| STM | Scanning Tunnel Microscope |
| STM | Security and Trust Management |
| STM | St. Thomas More College (Saskatoon, Saskatchewan, Canada) |
| STM | Shoot Meristemless |
| STM | Seize the Moment |
| STM | Structural/Thermal Model |
| STM | Supremo Tribunal Militar (Portugal) |
| STM | Soft Tissue Mobilization |
| STM | SONET Multiplexer |
| STM | Specific Transmission Module (railway) |
| STM | State Transition Matrix |
| STM | Sekolah Teknik Menengah |
| STM | Security Threat Mitigation (Cisco) |
| STM | Société de Transports de Montréal (French) |
| STM | Synchronous Transmission Mode |
| STM | Strategic Technology Management |
| STM | Santarem, Para, Brazil (Airport Code) |
| STM | Seashore Trolley Museum (Kennebunkport, Maine, USA) |
| STM | Strut-And-Tie Model (tool for analysis/design of concrete members) |
| STM | Short Term Missionary |
| STM | Staff Time Measurement |
| STM | Strokes Per Minute |
| STM | Strategic Transport Model |
| STM | Service de Santé au Travail Multisectoriel (Luxembourg) |
| STM | Springfield Telescope Makers (Springfield, Vermont astronomy club) |
| STM | Scream Tracker Module (a digital music format) |
| STM | Savor the Moment |
| STM | Soft Tissue Massage |
| STM | Soft Tissue Manipulation |
| STM | Software Test Management |
| STM | SGS-Thompson Microelectronics |
| STM | Single Thread Model |
| STM | Signaling Traffic Management |
| STM | System Test Mode |
| STM | Saint Thomas Moore (school) |
| STM | Support Test Manager (NASA) |
| STM | SONET Transmission Manager |
| STM | Science Teaching Methods |
| STM | Significant Technical Milestone |
| STM | Naval Ship Technical Manual (TMINS) |
| STM | Standard Time Meridian |
| STM | Synthetic Transaction Monitor |
| STM | Stewards Mate |
| STM | Stack Tritium Monitor |
| STM | Shallow Truncate Mode (Cisco) |
| STM | STEAR Testbed Manipulator |
| STM | Sindicato de Trabajadores de Migración (Spanish, Guatemala) |
| STM | Scattering Transfer Matrix |
| STM | Ship-To-Manufacturing |
| STM | Skill Training Material |
| STM | Space Track Message |
| STM | Syntax Tree Manager |
| STM | Sistema de Tratamento de Mensagens (Portuguese: System for Processing of Messages; Brazil) |
| STM | Structural Test Module |
| STM | Standby Temperature Monitor |
| STM | Service Test Model/Module |
| STM | Subsystem Traffic Manager |
| STM | Shin Tenchi Muyou (Anime) |
| STM | Small Text Message (pager message) |