• static induction transistor

In education

• School for International Training, Brattleboro, Vermont
• School of Information Technology, Kolkata, India
• Siddaganga Institute of Technology, Tumkur, Karnataka, India. (www.sit.ac.in)
• Sinhgad Institute Of Technology, Lonavala, India
• Southern Institute of Technology, Invercargill, New Zealand
• Stevens Institute of Technology, Hoboken, New Jersey
• Sydney Institute of TAFE, Sydney, Australia
• Salazar Colleges of Science And Institute of technology,211 N. Bacalso Avenue,Cebu City
• Sethu Institute of Technology, Pulloor, Kariapatti, Near Madurai, TamilNadu, India. (www.sethu.ac.in)

In computing

• Simple Internet Transition: methods of moving from IPv4 to IPv6
• .sit: a common file-extension for compressed files created with StuffIt
• Swatch Internet Time, a system of measuring time
• System integration testing, a process in software engineering

Other uses

• Singapore Improvement Trust, a government public-housing organization
• Slovenian tolar, the ISO 4217 code for the former currency of Slovenia
• Social identity theory
• Society of Instrument Technology
• Special information tone in telephony
• Sterile insect technique a technique for managing insect populations
• Strategic Information Technology a banking-software company
• Structural Information Theory a psychological theory about human perception
• Special Investigation Team of the Tokyo Metropolitan Police Department
• Systematic Inventive Thinking, an international consultancy firm
• Science Innovation Technology, a science and technology think tank for the British Government