| SM | Short Module | - | Organizations |
| SM | Shuttle Management (KSC) | - | Organizations |
| SM | SOft Manual | - | Organizations |
| SM | Stable Member | - | Organizations |
| SM | Support Module | - | Organizations |
| SM | SYstems Management | - | Organizations |
| SM | ESShuttle Mission Eng' | - | Organizations |
| SM | ESShuttle Mission Evaluation Simulation (Simulator) | - | Organizations |
| SM | IASerial Multiplexer Interface Adapter | - | Organizations |
| SM | Senior Moment | - | ISO Country Codes |
| SM | Sado-Masochism -San Marino (ISO 3166 And FIPS 10-4 Country Code Digram) -Soldier's Manual -Submarine Minelayer (US Navy Hull Classification) | - | Astronomy |
| SM | Samarium | - | Astronomy |
| SM | Samoan Language (ISO 639-1 Code) | - | Astronomy |
