| LOI | Letter Of Intent | 意向书 |
| LOI | Letter Of Indemnity | 保函，也称损害赔偿保证书 |
| LOI | Low Order Interface | 低阶接口 |
| LOI | limiting oxygen index | 极限氧指数 |
| LOI | Limited Over International | 国际有限公司 |
| LOI | Location of Interest | 感兴趣的位置 |
| LOI | Living Ocean International | 生活海洋国际 |
| LOI | level of inocompetence | 接种能力水平 |
| LOI | Lending One, Inc. | Lending One公司。 |
| LOI | Lack of Intelligence | 缺乏智力 |
| LOI | Letter Of Instruction | 指示函 |
| LOI | Letter Of Interpretation | 解释函 |
| LOI | Level Of Incompetence | 不称职程度 |
| LOI | Laughing on the Inside | 笑在内心 |
| LOI | Line of Inquiry | 查询行 |
| LOI | Ladies Of Infinity | 无限的女人 |
| LOI | Local Operator Interface | 本地操作员界面 |
| LOI | Lord Of Illusions | 幻觉之王 |
| LOI | Loss Of Input | 输入损失 |
| LOI | Life Outreach International | 国际生命外展 |
| LOI | Legion Of Illusion | 幻觉军团 |
| LOI | Letter of Indemnity (international trade and carriage business) | 赔偿函（国际贸易和运输业务） |
| LOI | Lack Of Information | 缺乏信息 |
| LOI | Level of Importance | 重要性级别 |
| LOI | Lament of Innocence (video game) | 无辜的哀歌（电子游戏） |
| LOI | Letter Of Instruction/Interest | 信的指令或利益 |
| LOI | List Of Items | 项目列表 |
| LOI | Loss of Imprinting (oncology) | 印记丢失（肿瘤学） |
| LOI | List of Illustrations | 图表目录 |
| LOI | Letter of Investigation | 调查通知书 |
| LOI | Leyton Obsessional Inventory | 莱顿非专业库存 |
| LOI | Loss On Ignition | 点火损失 |
| LOI | Lunar Orbit Insertion | 进入月球轨道 |
| LOI | Lack of Interest | 缺乏兴趣 |
| LOI | Letter of Invitation | 邀请函 |
| LOI | Letter of Inquiry | 询价函 |
| LOI | Lodge of Instruction (Masonic lodge) | 指示室（共济会） |