SNI may refer to: Science and technology Substitution nucleophilic internal, a chemistry reaction mechanism Swedish Standard Industrial Classification, a Swedish economic classification system Server Name Indication, an extension to the TLS computer networking protocol Companies Scripps Networks Interactive, a media company Showtime Networks Inc., an American cable network company Siemens Nixdorf Informationssysteme, a former computer hardware company Société Nationale d'Investissement, a Moroccan conglomerate Sports Network Incorporated, a former American media company Organizations National Information Service (Brazil), or Serviço Nacional de Informações, the former name of the Brazilian Intelligence Agency Shelter Now International, a Christian foreign aid organization, based in Germany and historically focused on Pakistan and Afghanistan Sistema Nacional de Investigadores, a Mexican government agency Soviet Naval Infantry Swiss Nanoscience Institute Other uses Standar Nasional Indonesia (Indonesian National Standard), formulated by the National Standardization Agency