| LSI | Lunar Science Institute | 月球科学研究所 |
| LSI | Large Scale Integration | 大规模集成电路 |
| LSI | Large-Scale Integrated circuit | 大规模集成电路 |
| LSI | Shetland Islands /Shetland Isd, Scotland, United Kingdom - Shetland Islands (Airport Code) | 喜乐蒂岛/喜乐,苏格兰,英国Isd -喜乐蒂岛(机场代码) |
| LSI | Large-Scale Integration | 大规模集成 |
| LSI | Laser Solutions Inc. | 激光解决方案公司。 |
| LSI | Lead Service Integrator | 首席服务集成商 |
| LSI | Lead Systems Integrator | 首席系统集成商 |
| LSI | lateral spinothalamic tract | 脊髓丘脑外侧束 |
| LSI | Lake Superior and Ishpeming Railroad | 苏必利尔湖和伊什佩明铁路 |
| LSI | Laboratory Safety Institute | 实验室安全研究所 |
| LSI | Latent Semantic Indexing (datamining) | 潜在语义索引（数据挖掘） |
| LSI | Langelier Saturation Index | 蓝氏饱和指数 |
| LSI | Lifesave International (biological research and education) | 国际救生组织（生物研究和教育） |
| LSI | Legal Support Inspection | 法律支持检查 |
| LSI | Lëvizja Socialiste Për Integrim (Albanian party: Socialist Movement for Integration) | Lëvizja Socialiste Për Integrim (Albanian party: Socialist Movement for Integration) |
| LSI | Lear Siegler, Incorporated | 李尔·西格勒公司 |
| LSI | Land-Shelf Interactions Initiative | 陆架相互作用倡议 |
| LSI | Line Status Indication | 线路状态指示 |
| LSI | Laser Spine Institute (Tampa, FL) | 激光脊柱研究所（佛罗里达州坦帕） |
| LSI | Logistic Services International, Inc | 国际物流服务公司 |
| LSI | Loop Start Interface | 循环启动界面 |
| LSI | Langier Saturation Index | Langier饱和指数 |
| LSI | Latent Semantic Information | 潜在语义信息 |
| LSI | Lutheran Services in Iowa | 爱荷华州路德教会服务 |
| LSI | L S I Logic Corporation | L S I Logic公司 |
| LSI | lateral sinus thrombosis | 侧窦血栓形成 |
| LSI | light scattering index | 光散射指数 |
| LSI | LSI Logic Corporation (stock symbol) | LSI Logic Corporation（股票符号） |
| LSI | lymphocyte stimulation indices | 淋巴细胞刺激指数 |
| LSI | List of Serials Indexed for Online Users | 为在线用户编制索引的系列列表 |
| LSI | Latent Semantic Indexing | 潜在语义索引 |
| LSI | Landed Surface Interrogator | 着陆地面询问机 |
| LSI | Legal Secretaries Incorporated | 法律秘书公司 |
| LSI | Legacy Systems International (Toronto, ON, Canada) | Legacy Systems International（加拿大安大略省多伦多） |
| LSI | Lightning Source Incorporated | Lightning Source Incorporated公司 |
| LSI | Landing Ship Infantry | 登陆舰步兵 |
| LSI | Land Surveyor Intern | 土地测量师实习生 |
| LSI | Lake Superior and Ishpeming Railroad Company | 苏必利尔湖和伊什佩明铁路公司 |
| LSI | Large Spark Ignited | 大火花点火 |
| LSI | Sumburgh, Scotland, UK | 英国苏格兰萨姆堡 |
| LSI | Landscape Shape Index | 景观形状索引 |
| LSI | Largest Single Item | 最大单个项目 |
| LSI | Leadership Strengths Interview (USACE) | 领导力优势面试（USACE） |
| LSI | Language Skills Institute (Philippines) | 语言技能学院（菲律宾） |
| LSI | Infantry Landing Ship | 步兵登陆舰 |
| LSI | Large Scale Incident (information security, disaster response) | 大规模事件（信息安全、灾难响应） |
| LSI | Language Studies International | 国际语言研究 |
| LSI | Land Sea Interface | 陆海界面 |
| LSI | Love, Sex, Intelligence (song by Shaman) | 爱、性、智慧（萨满之歌） |
| LSI | Lean Sustainment Initiative | 精益维持计划 |
| LSI | Life Styles Inventory (Human Synergistics) | 生活方式清单（人类协同效应） |
| LSI | Laserex Systems, Inc. | Laserex Systems公司。 |
| LSI | Low Ship Impact | 低船舶影响 |
| LSI | Listing Site Inspection | 挂牌现场检查 |
| LSI | Lighting, Starting, Ignition (automotive/batteries) | 照明、起动、点火(汽车/电池) |
| LSI | Large Scale Industries | 大型工业 |
| LSI | Launch Success Indicator | 发射成功指示器 |
| LSI | Linear Shift-Invariant | 线性移位不变量 |
| LSI | Lake Shore Industries | 湖岸工业 |
| LSI | Learning Systems Institute (Florida State University) | 学习系统研究所（佛罗里达州立大学） |
| LSI | Local Service Itemization | 本地服务分项 |