| Abbreviation | Definition |
|---|---|
| NRBM | Northern Rivers Business Magazine |
| NRBO | Nebraska Retail Buyers Order |
| NRR | No Responce Required |
| NRU | Newly Registered User |
| NSMC | National Student Marketing Competition |
| NTFS | No Time for Social |
| NYAC | New York Annual Conference |
| NYAC | New York Archives Conference |
| NYMA | New York Marketing Association |
| O | Old |
| O | Outreach |
| OATS | Opportunitites And Tracking System |
| OBM | Occasion Based Marketing |
| OBOI | On Balance Open Interest (trade market term) |
| OCC | organization of the Caribbean community |
| OCM | Office of Communications and Marketing |
| OCM | Online Cost Management |
| OCMC | Ontario College Marketing Competition |
| OCMC | Ontario Colleges Marketing Competition |
| OCPM | Optimized Cost Per Mille |