| extension name | file type | Classification |
|---|---|---|
| OLB | OrCAD Symbol Library File | CAD file |
| OPJ | OrCAD Project File | CAD file |
| OPT | Opterecenja File | CAD file |
| extension name | file type | Classification |
|---|---|---|
| OLB | OrCAD Symbol Library File | CAD file |
| OPJ | OrCAD Project File | CAD file |
| OPT | Opterecenja File | CAD file |