SI
Si stands for:
- Si (official) , name of an ancient Egyptian official
- Si (Mali) , seat of a district administration in the Ségou region in Mali
- Piaggio Si , name of a moped and small motorcycle from Piaggio
- Si Tianfeng (* 1984), Chinese walker
- Si Yajie (* 1998), Chinese water diver
- Si Yew-Ming (* 1979), Malaysian tennis player
- the district Si (泗县; Pinyin: Sì Xiàn) of the prefecture-level city of Suzhou in the Chinese province of Anhui, see Si (Suzhou)
- Silicon , according to the symbols of the chemical elements
- Sportinformation Si , Swiss sports news agency
SI or SI stands for:
- International system of units
- Israel Standard , Israeli norm standard
- Schweizer Illustrierte , Swiss tabloid magazine
- Swiss IT Society
- Swimming instructor , specialist instructor for swimming, diving and diving in Switzerland
- Sensory integration , interplay of sensory modalities
- Sentiero Italia , long-distance hiking trail
- Service indicator , service identifier in the ISDN protocol
- Silver locus , gene location whose product plays a role in melanin synthesis
- Sinc function , analytic function
- Sinus Integralis , function given by an integral, integral sine
- Situationist International , group of European interdisciplinary intellectuals
- Slovenia , country code according to ISO 3166-1
- Smithsonian Institution , a major US research and educational institution
- Soroptimist International , international women's organization
- Socialist Initiative , a successor organization to The Clarity
- Socialist International , worldwide union of socialist and social democratic parties
- Sparkassen Informatik , IT service provider and data center of the Sparkassen
- Speed index , letter index to identify the maximum permitted speed for tires
- SPORTident , data system for orienteering
- Sports Illustrated , American weekly sports magazine
- Hotel Stuttgart International (near the airport), expanded to become the SI Center in Stuttgart-Möhringen
- Surface Interval , the surface interval for a repetitive dive , see: Dive # Repetitive dives
- Svenska institutet , Swedish State Institute
- a Soviet locomotive series, see SŽD series СИ
SI as a distinguishing mark on license plates:
- Germany: Siegen-Wittgenstein district
- Italy: Province of Siena
- Poland: independent city of Siemianowice Śląskie
- Slovakia: Okres Skalica
ŠI as a distinguishing mark on license plates:
SÍ stands for:
- SÍ Sørvágur , Faroese football club
- SÍ Sumba , Faroese football club
si or .si stands for:
- Tone name H, see tone names in other languages
- chemical descriptor, see prochirality
- .si , top-level domain of Slovenia
- insel collection , German book series by Insel Verlag (1965–1969)
- Sinhala language , language code according to ISO-639-1
- Cardinal sinus , mathematical function
- Slovenia , country code according to ISO 3166
- The sinc function or the si function
- small inclusions , purity grade of diamonds; see diamond # purity (clarity)
See also:
