| Abbreviation | Definition |
|---|---|
| SMC | Switch Management Center |
| SMDF | Subscriber Maintenance Distributing Frame |
| SMDR | Station Message Detail Recording |
| SMDS | Satellite Multimedia Delivery System |
| SMDS | Switched Multi-megabit Data Service |
| SMFD | Surface Mounted Flexible Delineators |
| SMFE | SecurityTube Metasploit Framework Expert |
| SMG | Super Master Group |
| SMIT | Studies on Media Information and Telecommunication |
| SML | Service Management Layer |
| SMOFC | Single-Mode Optical Fiber Cable |
| SMS | Server Malloc (Memory ALLOCation) System |
| SMS | Service Management System |
| SMS | Short Message Service |
| SMT | Secure Mobile Transfer |
| SMTI | Service Manager Telephony Integration |
| SMTT | Simplified Municipal Telecommunications Tax |
| SMU | Service Management Unit |
| SNAP | Sub-Network Access Protocol |
| SNECS | Single National Emergency Call System |