Kone tuottajat - sivu 155
| OLYMPIC SEIKI | 1 | |
| OM PIMESPO | 1 | |
| OMAB | 1 | |
| OMBA | 1 | |
| OMC | 1 | |
| Omca | 1 | |
| OMCG | 1 | |
| OMEGA | 1 | |
| OMNICUT | 1 | |
| OMP EUROMATIC | 1 | |
| OMZ | 1 | |
| Opticut | 1 | |
| OPTIMUM MASCHINEN | 1 | |
| ORADEA | 1 | |
| ORBIT | 1 | |
| ORC | 1 | |
| ORENSTEIN KOPPEL | 1 | |
| ORION | 1 | |
| OTC | 1 | |
| OTEK | 1 |
| OLYMPIC SEIKI | 1 | |
| OM PIMESPO | 1 | |
| OMAB | 1 | |
| OMBA | 1 | |
| OMC | 1 | |
| Omca | 1 | |
| OMCG | 1 | |
| OMEGA | 1 | |
| OMNICUT | 1 | |
| OMP EUROMATIC | 1 | |
| OMZ | 1 | |
| Opticut | 1 | |
| OPTIMUM MASCHINEN | 1 | |
| ORADEA | 1 | |
| ORBIT | 1 | |
| ORC | 1 | |
| ORENSTEIN KOPPEL | 1 | |
| ORION | 1 | |
| OTC | 1 | |
| OTEK | 1 |
