SE

Se may stand for:

• Selenium, a chemical element
• Se (kana) (せ and セ), a Japanese kana
• Se (unit of measurement) (畝), a Japanese unit of area
• Northern Sami language ISO 639-1 code
• Se (instrument) (瑟), a traditional Chinese musical instrument

Geography

• Sé, Hungary
• Sè, Atlantique, Benin
• Sè, Mono, Benin

SE may stand for:

• Sweden ISO country code and Internet ccTLD
• SE postcode area
• Southeast (disambiguation)
  • One of the four ordinal directions, in weather forecasting and geography
• Stock exchange
• Second Edition
• Special edition
• Special Entry, in a tennis or other tournament

Technological, science and manufacturing:

• Single-ended (disambiguation)
  • Single-ended signalling, a method used in the SCSI standard
• Software engineering
• Systems Engineering
• Macintosh SE "System Expansion", a personal computer manufactured by Apple
• SE Electronics, a microphone manufacturer based in Shanghai
• Slovenské elektrárne, the state electricity company of Slovakia
• Mercedes-Benz SE, "Sonderklasse Einspritzung" (Special or Super Class Fuel Injected) automobile, see Mercedes-Benz W108
• Sony Ericsson, a mobile phone company formed by Sony and Ericsson
• Ferrocarriles Unidos del Sureste reporting mark
• Super Extra, in relation with a car body style
• SE, IATA airline designator for XL Airways France (formerly "Star Airlines")

Science and education

• Schloss Einstein, a German television program for children and teenagers
• Schola Europaea
• Sex education
• Side effect (disambiguation)
• Manually Coded English or Siglish
• Somatic Experiencing, a form of psychological therapy
• Standard error (statistics), a standard deviation of a sample normalized by the square root of the sample size
• Synthetic Environment

Government and states

• Scottish Executive, the Scottish Government, the executive arm of the Scottish Parliament; and the civil service serving that government
• Sergipe (SE), a Brazilian state
• Societas Europaea, an European public company
• Spaceship Earth

Other

• Sanitation Engineer, a reference name for a garbage collector
• Sheen Estevez, a character in Jimmy Neutron: Boy Genius