| MDEP | Mitglied des Europäischen Parlaments (German: member of European Parliament) | Mitglied des Europäischen Parlaments (German: member of European Parliament) |
| MDEP | Multinational Design Evaluation Program (nuclear industry) | 跨国设计评估计划（核工业） |
| MDEP | Management Decision Package | 管理决策包 |
| MDEP | Management Decision Evaluation Package | 管理决策评估包 |
| MDEP | Maine Department of Environmental Protection | 缅因州环境保护部 |