| Oil And Natural Gas Corporation Limited | delhi | 4676 | |
| Oil And Natural Gas Corporation Limited | gujarat | 115 | |
| Oil And Natural Gas Corporation Limited | uttarakhand | 3336 | |
| Oil And Natural Gas Corporation Limited | jharkhand | 111 | |
| Oil And Natural Gas Corporation Limited | tamil nadu | 195 | |
| Oil And Natural Gas Corporation Limited | gujarat | 1509 | |
| Oil And Natural Gas Corporation Limited | gujarat | 1744 | |
| Oil And Natural Gas Corporation Limited | gujarat | 1181 | |
| Oil And Natural Gas Corporation Limited | gujarat | 869 | |
| Oil And Natural Gas Corporation Limited | tamil nadu | 780 | |
| Oil And Natural Gas Corporation Limited | gujarat | 368 | |
| Oil And Natural Gas Corporation Limited | andhra pradesh | 1510 | |
| Oil And Natural Gas Corporation Limited | assam | 2532 | |
| Oil And Natural Gas Corporation Limited | andhra pradesh | 231 | |
| Oil And Natural Gas Corporation Limited | goa | 61 | |
| Oil India Limited | assam | 52 | |
| Oil India Limited | assam | 3 | |
| Oil Industry Development Board | uttar pradesh | 3 | |
| Oil Industry Safety Directorate | delhi | 5 | |
| Omnibus Industrial Development Corporation | daman diu | 1 | |
| Online Library Catalog, Department of Consumer Affairs | central government | 1 | |
| Online Registration, Tamil Nadu Public Service Commission | tamil nadu | 76 | |
| Ordnance Cable Factory | chandigarh | 18 | |
| Ordnance Depot Talegaon Dabhade | central government | 9 | |
| Ordnance Factory | central government | 4 | |