SGI may refer to:
Companies Saskatchewan Government Insurance Scientific Games International, a gambling company Silicon Graphics, Inc., a former manufacturer of high-performance computing products Silicon Graphics International, formerly Rackable Systems, which acquired the former Silicon Graphics, Inc. Smoking Gun Interactive, a video game company Synthetic Genomics, Inc., an alternative fuels company
Other uses Saanich-Gulf Islands, a federal electoral district in British Columbia, Canada Silicon Graphics Image, a graphics file format for Silicon Graphics workstations Soka Gakkai International, a Nichiren Buddhist movement and also a non-governmental organization (NGO) SGI, the IATA code for Mushaf Airbase in Pakistan Stargate Infinity, an animated television series Spheroidal graphite iron, another name for ductile iron Sustainable Governance Indicators, statistics measuring the need for reform among Organisation for Economic Co-operation and Development countries
See also SG1 (disambiguation) SGL (disambiguation)