| BUO | Biblioteca de la Universidad de Oviedo | 奥维耶多大学图书馆 |
| BUO | Brown University Orchestra | 布朗大学管弦乐团 |
| BUO | Burao, Somalia | 索马里布劳 |
| BUO | bleeding of undetermined origin | 不明原因出血 |
| BUO | bruising of undetermined origin | 来源不明的瘀伤 |
| BUO | bilateral ureteral occlusion | 双侧输尿管闭塞 |
| BUO | bleeding or bruising of undetermined origin | 来源不明的出血或淤青 |
| BUO | Bogazici Universitesi Oyunculari (avant-garde theatre group at Bogazici University, Turkey) | 博加齐奇大学（土耳其博加齐齐大学前卫剧团） |