| Abbreviation | Definition |
|---|---|
| OBIC | Optical Beam Induced Current |
| OBL | Object-Based Language |
| OBO | Output Back-Off |
| OBR | Optical Bar Recognition |
| OC | Open Circuit |
| OC | Open Collector |
| OC | Operating Characteristic |
| OC | Optical Cable |
| OC | Optical Circuit |
| OC | Over Current |
| OCB | Oil Circuit Breaker |
| OCC | Open Circuit Characteristics |
| OCDP | Over Current Discharge Protection |
| OCE | Oil Capital Electric |
| OCEC | Otero County Electric Cooperative |
| OCEC | Otero County Electric Cooperative, Inc. |
| OCL | Open Circuit Locator |
| OCP | Open Circuit Potential |
| OCP | Over Current Protection |
| OCR | Optical Character Recognition |