| SMDI | Saturated Methylene Diphenyldiisocyanate | 饱和亚甲基二苯基二异氰酸酯 |
| SMDI | SCSI Musical Data Interchange | SCSI音乐数据交换 |
| SMDI | Storage Module Disk Interconnect | 存储模块磁盘互连 |
| SMDI | Station Message Desk Interface | 车站信息台接口 |
| SMDI | Simplified Message Desk Interface (telephone network service, customer interface specification) | 简化的信息台接口（电话网络服务、客户接口规范） |
| SMDI | Simplified Message Desk Interface | 简化的留言台界面 |
| SMDI | Scientific Medical Devices, Inc. | 科学医疗设备公司。 |