SLI may refer to: Science and technology Scalable Link Interface, for connecting multiple video cards (Nvidia) Scan-Line Interleave, for connecting multiple video cards (3dfx) Safe Load Indicator in cranes Service Level Indicator Space Launch Initiative SLI battery, used in automotives Street light interference, a pseudoscientific idea Symmetric level-index arithmetic, in mathematics Business and finance SAP Labs India, the Indian subsidiary of SAP AG SLI Systems, a software company in New Zealand Supplemental Liability Insurance, for car rental Swiss Leader Index, a market index Sylvania Lighting International Other Sensory Logical Introvert Specific language impairment The Somerset Light Infantry, a former regiment in the British Army Southwestern Louisiana Institute of Liberal and Technical Learning