Sis

• Australian Secret Intelligence Service
• Canadian Security Intelligence Service
• Finnish Security Intelligence Service
• GSI Helmholtz Centre for Heavy Ion Research
• Information and Security Service of the Republic of Moldova
• Kozan, Adana
• Los Angeles Police Department
• Magic (cryptography)
• McGill University School of Information Studies
• Michael Sis
• Mountains of Sis
• New Zealand Security Intelligence Service
• SIS (file format)
• SIS (group)
• SIS (motorbikes)
• SIS International Research
• SIS Swiss International School
• Safety instrumented system
• Saline infusion sonography
• Satellite Information Services
• Schengen Information System
• School of International Service
• School of International Studies of the Dresden University of Technology
• Second-impact syndrome
• Secret Intelligence Service
• Security Information Service
• Selective inverted sink
• Seoul International School
• Sequential Importance Sampling
• Serviço de Informações de Segurança
• Sex in space
• Sharjah Indian School
• Shekou International School
• Shimano Index Shifting
• Short integer solution problem
• Shoulder impingement syndrome
• SiS (TV series)
• Siemens IT Solutions and Services
• Signals Intelligence Section
• Signals Intelligence Service
• Silicon Integrated Systems
• Singapore International School
• Singapore International School Mumbai
• Single-image stereogram
• Single-instance storage
• Sis (ancient city)
• Sis Rural District (East Azerbaijan Province)
• Sis Rural District (Kurdistan Province)
• Sis, Armenia
• Sis, Azerbaijan
• Sis, Iran
• Sis, Kurdistan
• Sissy
• Sister
• Sisters in Islam
• Slovenská informačná služba
• Small intestinal submucosa
• South Island School
• Space Infrastructure Servicing
• Special Intelligence Service
• Special Investigations Section
• Specialized Information Services
• State Information Service
• Stockholm International School
• Strategic information system
• Student information system
• Superconductor-insulator-superconductor tunnel junction
• Supervised injection site
• Surabaya International School
• Survey of India Service
• Swedish National Board of Institutional Care
• Swedish Standards Institute
• Syracuse University School of Information Studies
• United States National Library of Medicine
• University of Pittsburgh School of Information Sciences