| Abbreviation | Definition |
|---|---|
| SCS | Single Crystal Silicon |
| SCSI-2 | Fast Small Computer System Interface |
| SCSI-3 | Ultra Small Computer System Interface |
| SCSM | Silicon Carbide Semiconducting Material |
| SCT | SciTex continuous tone image format |
| SCU | Signaling-System Control Unit (ITU-T) |
| SCVS | Servo Controlled Voltage Stabilizers |
| SD | Small Dual in-line package |
| SD | Sound Dampened |
| SD | Standard Definition |
| SD | Static Dissipation |
| SD | Statistical Division |
| SD | Synchronous Dynamic |
| SDC | Symmetric Differential Capacitive |
| SDD | Silicon Drift Detector |
| SDE | Source-Drain Extension |
| SDEC | South Dakota Electrical Council |
| SDER | San Diego Electric Railway |
| SDES | hort-distance Echo-Suppression |
| SDFL | Schottky-Diode FET (Field Effect Transistor) logic |