| Abbreviation | Definition |
|---|---|
| JYC | Jubilee Yacht Club |
| JYC | Juneau Yacht Club |
| KDY | Kongelig Dansk Yachtklub |
| KYS | Kentuckiana Yacht Sales |
| KYS | Kentuckiana Yacht Services |
| LIYC | Lido Isle Yacht Club |
| LIYC | Long Island Yacht Club |
| LMY | Luxury Mediterranean Yachting |
| LOLLY | Large Overpowered Luxury Land Yacht |
| LORC | Lake Ontario Racing Council (yacht club organization) |
| LOYD | Lars Oudrup Yacht Design |
| MBY | Motor Boat Yachting |
| MBYC | Macatawa Bay Yacht Club |
| MCY | Monte Carlo Yachts |
| MCYA | Mississippi Coast Yachting Association |
| MORF | Midwest Open Racing Fleet |
| MTSI | Megayacht Technical Services International |
| MWW | Mid- Winters West Yacht Club |
| MYC | Model Yacht Club |
| MYC | Muskegon Yacht Club |