SIUI
| Acronym | Definition |
|---|---|
| SIUI | Sistemul Informatic Unic Integrat (Romanian: Single Integrated Information System) |
| SIUI | Shantou Institute of Ultrasonic Instruments Co., Ltd. (Guangdong, China) |
| SIUI | Surat Izin Usaha Industri (Indonesian: Industrial Business License) |
| SIUI | Stimulated Intra Uterine Insemination |