| Abbreviation | Definition |
|---|---|
| NAR | National Advertising Revenue |
| NARC | National Advertising Review Council |
| NBAI | National Business Advertising Inc |
| NPA | National Promotions and Advertising |
| NSAC | National Student Advertising Competition |
| NYD | New York Design |
| OAAI | Outdoor Advertising Association of Illinois |
| OAAT | Outdoor Advertising Association of Texas |
| OACG | Outdoor Advertising Consulting Group |
| oADV | Online ADVertising |
| OAN | Online Advertising Network |
| OBA | Online Behavioral Advertising |
| OLA | On Line Advertising |
| OLA | On-Line Advertising |
| OLAF | On Line Advertising Forum |
| OMD | Omnicom Media Department |
| OMMA | Online Marketing Media and Advertising |
| OUAA | Ohio University Advertising Association |
| PAA | Pakistan Advertising Association |
| PAAB | Pharmaceutical Advertising Advisory Board |