| OP | occipitoparietal; occipitoposterior; occiput posterior; octapeptide; olfactory peduncle; opening pre... |
|---|---|
| proc | proceedings, procedure; process |
| PROC | GLM general linear model procedure |
| SOP | service-object pair; standard operating procedure |
| SPU | short procedure unit; Society of Pediatric Urology; standardized photometric unit |