| IOU | I owe you | 借条 |
| IOU | I Love you | 我愛你 |
| IOU | Investor Owned Utilities | 投资者拥有的公用事业 |
| IOU | Intensive therapy Observation Unit | 强化治疗观察组 |
| IOU | Is Owed Unto .... | 欠。。。。 |
| IOU | I Owe Unto | 我爱你 |
| IOU | Input/Output Unit | 输入输出装置 |
| IOU | International Octel Users | 国际八进制用户 |
| IOU | Islamic Online University | 伊斯兰在线大学 |
| IOU | Intensive Therapy Observation Unit. | 强化治疗观察室。 |
| IOU | Insert or Update (database) | 插入或更新（数据库） |
| IOU | I Own You | 我拥有你 |
| IOU | Interdependent Occupational Unit (currency of Lovely, UK humorous country) | 相互依赖的职业单位（英国幽默国家Lovely的货币） |
| IOU | Is Owed Unto | 欠下的 |
| IOU | Investor Owned Utility | 投资者拥有的公用事业 |
| IOU | Ile Ouen, New Caledonia | 新喀里多尼亚Ile Ouen |