SEI

Sei or SEI may refer to:

Arts

 * Sei (album), by Brazilian singer and composer Nando Reis
 * "Sei", the title-song and first single from that album
 * Sei (film), a 2018 Tamil thriller film

Organizations and companies

 * 7-Eleven, a popular multinational chain of gas stations and convenience stores
 * Safety Equipment Institute, a private, non-profit organization established to test safety and protective products
 * Scottish Episcopal Institute, the theological college of the Scottish Episcopal Church
 * Script Encoding Initiative, a department at UC Berkeley supporting proposals for minor and historic scripts in the Unicode Standard.
 * Scuba Educators International, a non-profit diver training organization
 * SEI Investments Company, a financial services company headquartered in the United States
 * Slough Estates International, the former name for Segro
 * Smith Enterprise, a firearm and accessory manufacturing facility based in Tempe, Arizona that is known for making flash suppressors, muzzle brakes, sound suppressors, M14 rifles and accessories for M14 rifles.
 * Software Engineering Institute, a federally funded research and development center at Carnegie Mellon University
 * SpaceWorks Enterprises, a small aerospace engineering company in the United States
 * Stockholm Environment Institute, a non-profit institute that specializes in sustainable development and environmental issues
 * Sustainable Endowments Institute, a special project of Rockefeller Philanthropy Advisors, Inc, the Sustainable Endowments Institute (SEI) has pioneered research, education and outreach to advance resilient institutional responses to the climate crisis.
 * Sumitomo Electric Industries, a manufacturer in automotive, information and communications, electronics, environment and energy, and industrial materials
 * SUNY Eye Institute, a medical and basic sciences research institute in New York

People

 * Given name
 * Shō Sei (1497–1555), king of the Ryukyu Kingdom from 1526 to 1555
 * Shō Sei (r. 1803), king of the Ryukyu Kingdom in 1803
 * Sei Fujii (1882–1954), Japanese male immigrant rights activist in the United States
 * Sei Hatsuno (born 1976), Japanese male writer of mystery and thriller novels
 * Sei Ashina (born 1983), Japanese actress
 * Sei Kawahara (born 1995), Japanese male figure skater
 * A member of girl group Weki Meki


 * Surname
 * Indrek Sei (born 1972), Estonian freestyle swimmer

Other uses

 * Sei whale, a baleen whale
 * Se'i, traditional bacon from Timor, Indonesia
 * Seebeck effect imaging, uses a laser to generate thermal gradients in conductors in order to locate electrically floating conductors
 * Secondary electron image, a type of imaging in scanning electron microscopes to view sample topography
 * Seri language, spoken in two Mexican villages
 * Service endpoint interface, a term used in Java Platform, Enterprise Edition when exposing Enterprise JavaBean as web service
 * Social-Emotional Intelligence (see Emotional Intelligence)
 * Solid-electrolyte interphase (see Lithium-ion battery)
 * Space Exploration Initiative, a plan envisioned by former U.S. President George H.W. Bush with crewed Moon and Mars missions
 * Spanish East Indies, a former Spanish colony comprising the Philippines and most of Micronesia