| UIW | University of the Incarnate Word | 聖道大學 |
| UIW | Universal (Mechanical) Iron Worker | 通用（机械）铁工 |
| UIW | Underground Injection Well | 地下注入井 |
| UIW | United Industrial Workers | 工业工人联合会 |
| UIW | Union of Injured Workers | 受伤工人工会 |
| UIW | Underground Independent Wrestling | 地下独立摔跤 |
| UIW | Universal In- Wall speaker | 通用内置扬声器 |
| UIW | United Indian Websites | 联合印度网站 |