| Abbreviation | Definition |
|---|---|
| SAC | Security and Access Control |
| SAC | Smoothed Active Contour |
| SACE | Semi-Automatic Check-out Equipment |
| SAD | Scientifically Aided Design |
| SAD | Selected Area Diffraction |
| SAD | Silicon Avalanche Diode |
| SAD | System Analysis and Design |
| SADEC | Saudi Arabian Defense Electronics Company |
| SAE | Society of Automotive Engineers |
| SAEC | South Alabama Electric Cooperative |
| SAECH | Swaziland Automated Electronic Clearing House |
| SAED | Selected Area Electron Diffraction |
| SAES | Solar Array Electrical Simulator |
| SAFER | Safety and Fitness Electronic Records |
| SAFI | Short-term Average Failure Intensity |
| SAGE | Solvent Alternatives GuidE |
| SAM | Scanning Auger Microscopy |
| SAM | Self-Assembled Monolayer |
| SAM | Substrates, Assembly, and Microsystems |
| SAM | Synthetic Audio Micro |