| ECDL | External Class Description, Local Class Members | 外部类描述，本地类成员 |
| ECDL | Echelle Collective de DÉveloppement Logique (French) | Echelle Collective de DÉveloppement Logique (French) |
| ECDL | European Conference on Digital Libraries | 欧洲数字图书馆会议 |
| ECDL | European Computer Drivers License | 欧洲计算机驾驶执照 |
| ECDL | El Canto del Loco (band) | El Canto del Loco（乐队） |
| ECDL | European Computer Driving License (computer skills certification programme; European Computer Driving Licence Foundation | 欧洲计算机驾驶执照（计算机技能认证计划；欧洲计算机驾驶证基金会 |
| ECDL | External-Cavity Diode Laser | 外腔二极管激光器 |
| ECDL | Error Correction Delay Length | 纠错延迟长度 |
| ECDL | Elliptic Curve Discrete Logarithm | 椭圆曲线离散对数 |
| ECDL | European Computer Driving Licence | 欧洲计算机驾驶执照 |
| ECDL | European Conference on Research and Advanced Technology for Digital Libraries | 欧洲数字图书馆研究与先进技术会议 |