Maskin produsenter starter med bokstaven O - side 4
| 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 | |
| OTI | 1 | |
| OTINUS | 1 | |
| OTTO | 1 | |
| OTTO MUeLLER | 1 | |
| OZBORN | 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 | |
| OTI | 1 | |
| OTINUS | 1 | |
| OTTO | 1 | |
| OTTO MUeLLER | 1 | |
| OZBORN | 1 |
