| Subscriber Interface Unit |
Computer and Networking |
SIU |
| signal interface unit |
Government |
SIU |
| Seafarers International Union |
Professional Organizations |
SIU |
| SINGUR |
Indian Railway Station |
SIU |
| Stimulus Isolation Unit |
Physiology |
SIU |
| Simulation Interface Unit |
Military |
SIU |
| Scheduling Information Unsolicited |
Business |
SIU |
| Special Investigation Unit |
Other |
SIU |
| Seiko Instruments USA, Inc. |
Business Firm |
SIU |
| standard interface unit |
Government |
SIU |
| Shelf Interface Unit |
Electronics |
SIU |
| Siuna airport |
Regional Airport Code |
SIU |
| Special Investigations Unit |
Police |
SIU |
| system interface unit |
Government |
SIU |
| Siuna |
Airport Code |
SIU |
| systems interface unit |
Government |
SIU |
| Sensor Interface Unit |
Hardware |
SIU |
| Southern Illinois University |
University |
SIU |
| Siuna, Nicaragua |
Regional Airport Code |
SIU |
