| OCAD | occlusive carotid artery disease | 闭塞性颈动脉疾病 |
| OCAD | O'Connor Architectural Design (Ireland) | 阿'Connor建筑设计(爱尔兰) |
| OCAD | Ontario College of Art and Design (Canada) | 安大略艺术与设计学院（加拿大） |
| OCAD | Otis College of Art and Design | 奥蒂斯艺术与设计学院 |
| OCAD | Ontario College of Art and Design | 安大略省美术学院 |