|
| 1514 | Oilseed crushing mills | |
| 1514 | Oilseed crushing mills (except soybean) | |
| 5121 | Oilseeds, wholesale | |
| 2423 | Ointments, manufacturing | |
| 8519 | Old age homes, providing personal nursing care | |
| 7512 | Old age pensions board, provincial | |
| 7530 | Old age security program, federal government | |
| 8531 | Old folks home | |
| 8531 | Old soldiers' homes | |
| 2430 | Olefin fibres and filaments, manufacturing | |
| 2411 | Olefins (alkenes), made from refined petroleum or natural gas liquids | |
| 2429 | Oleic acid (red oil), manufacturing | |
| 2411 | Oleic acid esters, manufacturing | |
| 2411 | Oleum (i.e., fuming sulphuric acid), manufacturing | |
| 0112 | Olive groves and farms | |
| 1514 | Olive oil, made from purchased oils | |
| 1514 | Olive oil, made in crushing mills | |
| 1513 | Olives, brined, manufacturing | |
| 1513 | Olives, dried, made in dehydration plants | |
| 1429 | Olivine (nongem) mining | |
| 7514 | Ombudsman's office, provincial government | |
| 3312 | Omni-bearing indicators, manufacturing | |
| 3312 | Omnibearing instrumentation, manufacturing | |
| 4520 | One-family house construction, general contractors | |
| 7494 | One-hour film developing service | |
| 0112 | Onion farming | |
| 0112 | Onions, dry, growing | |
| 0112 | Onions, green (shallots), growing | |
| 1513 | Onions, pickled, manufacturing | |
| 6420 | On-line access service provider | |
| 1410 | Onyx marble, crushed and broken stone, quarrying | |
| 1410 | Onyx marble, dimension-quarrying | |
| 9212 | Open air motion picture theatres | |
| 6599 | Open-end funds | |
| 9214 | Opera companies | |
| 1810 | Opera hats, made from purchased fabric | |
| 8090 | Opera school | |
| 9214 | Opera singers, independent | |
| 4550 | Operating heavy construction machinery | |
| 3311 | Operating room tables, manufacturing | |
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