SE, Se, or Sé may refer to:

Initialisms

* Standard Edition (e.g. Java Platform, Standard Edition) * Special edition, Special Edition * Second Edition (e.g. Windows 98#Windows 98 Second Edition, Windows 98 Second Edition)

Arts and entertainment

* Sé (album), ''Sé'' (album), by Lúnasa, 2006 * Se (instrument), a traditional Chinese musical instrument

Businesses and organizations

* ''Societas Europaea'', a form of legal entity registered under European Union law * Sea Ltd (NYSE: SE), tech conglomerate headquartered in Singapore * Slovenské elektrárne, electric utility company in Slovakia * XL Airways France, IATA airline designator SE * Southeastern (train operating company), or SE Trains Limited, in England

Places

* Sè, Atlantique, Benin * Sè, Mono, Benin *Subprefecture of Sé, São Paulo, Brazil **Sé (district of São Paulo) **Sé (São Paulo Metro), a station *Sé, Hungary *Sé, Macau *Sé (Angra do Heroísmo), Terceira, Azores, Portugal *Sé (Braga), Portugal *Sé (Bragança), Faro, Portugal *Sé (Funchal), Madeira, Portugal *Sé, Lamego, Portugal *Sé (Lisbon), Portugal *Sé, Portalegre, Portugal *Sé (Porto), Portugal * SE postcode area, London, England * Sergipe (SE), a state of Brazil * Sweden, ISO country code SE

Language

* Se (kana) (せ and セ), a Japanese kana * Northern Sami language, ISO 639-1 code se * Standard English, in linguistics * Se (letter) (Ս,ս) an Armenian letter

Science and technology

* Se (unit of measurement), a Japanese unit of area * .se, Internet country code top-level domain for Sweden * Se (text editor), Se, a text editor * Selenium, symbol Se, a chemical element * Special Euclidean group * Standard error, of a statistic * Status epilepticus, a medical state of persistent seizure * Synthetic environment, a computer simulation * Sony Ericsson, a former name of Sony Mobile * iPhone SE, a series of budget smartphones by Apple * Macintosh SE, an Apple personal computer

Other uses

* Southeast (direction) * S. E. (name), initials used by several people * Lisbon Cathedral, or simply the Sé, Portugal * Sé da Guarda, Portugal * Split end, a type of wide receiver in American football * Somatic experiencing, a method of alternative therapy * Asüna SE, a compact car marketed in Canada * Secondary School Entrance Examination, a standardized examination from 1962 to 1977