Sif is a Norse goddess and the wife of Thor. Sif or SIF may also refer to: Sif Sif (character), the Norse goddess as portrayed in Marvel Comics Sif (Marvel Cinematic Universe), the character's portrayal in the MCU Sif, the official Swedish name for the Swedish Union of Clerical and Technical Employees in Industry Sif (or se'if in Hebrew), a subsection in the Shulkhan Arukh (Code of Jewish Law) Sif, Yemen Sif Glacier, Northern Greenland Siamou language (ISO 639:sif) 4484 Sif, a main-belt asteroid Sif Mons, a shield volcano in Eistla Regio on Venus Sif, the Great Grey Wolf, a boss character in the video game Dark Souls SIF Organizations Central European Institute of Philosophy (SIF) (Czech: Středoevropský Institut Filosofie) Italian Physical Society (Italian: Società Italiana di Fisica) Save Indian Family, a men's rights movement in India Science of Identity Foundation, a religious organization based in Hawaii, United States Seychelles Islands Foundation, manages and protects the World Heritage Sites of Aldabra and Vallee de Mai Shropshire Islamic Foundation Singapore International Foundation, a non-profit organisation in Singapore Society for Individual Freedom, a United Kingdom-based association promoting individual freedom Somali Islamic Front, also known as Jabhatul Islamiya Sons of Italy Foundation, a philanthropic subsidiary of the Order Sons of Italy in America Science and technology Safety instrumented function, a form of industrial process control Schools Interoperability Framework, a data sharing specification (XML data standard and SOA infrastructure standard) for K-12 education institutions in the US, UK and AU Selective Identification Feature, modes used to identify aircraft Small intensely fluorescent cell, interneurons of the sympathetic ganglia Source Input Format (MPEG-1) Standard Interchange Format, a data format for Geographic Data defined in FGDC-STD-001-1998 Stress intensity factor, used in fracture mechanics to predict the stress state Sport clubs SÍF Sandavágur, a Faroese Football club Sandvikens IF, a Swedish football club Silkeborg IF, a Danish football club Stavanger IF, a Norgwegian football and handball club SIF Stadion, the home sports venue of the Stavanger IF team Stocksunds IF, a Swedish sportsclub in Stocksund Strømsgodset IF, a Norwegian football club from Drammen and their professional team Strømsgodset Toppfotball Stattena IF, a Swedish football club in Helsingborg Other uses Specialized Investment Fund, a type of Investment Fund Staten Island Ferry, operated by the New York City Department of Transportation Love Live! School Idol Festival, School Idol Festival, a mobile game as part of the Love Live! franchise See