| Abbreviation | Definition |
|---|---|
| ONY | Original Noodles For You |
| OO | Orange Oatmeal |
| OOE | Oceans Of Elixir |
| OOFA | Ottawa Organic Food Alternative |
| OOFC | open oral food challenge |
| OOJ | Oil Of Julep |
| OON | Out Of Nuts |
| OOP | Out Of Production |
| OOTD | Oodles Of Turkey Dressing |
| OP | Orange Pekoe |
| OP | Orange Potatoes |
| OPFC | Oral peanut food challenges |
| OQF | Organic and Quality Foods |
| OSB | Order Some Beer |
| OSFP | Oakville Sustainable Food Partnership |
| OSP | Orange Smoothie Pack |
| OSS | Over-Seas Special |
| OTG | Over The Glasses |
| OTP | Other Tobacco Products |
| OTR | On The Rocks |