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ER or Er may refer to:

Arts and entertainment[edit]

Businesses and organizations[edit]

Finance and banking[edit]


  • -er, a suffix added to adjectives or adverbs to form a comparative (e.g. fast to faster)
  • -er, a suffix added to a verb to make it an agent noun (e.g. cut to cutter)
  • Oxford "-er", a suffix used to form words like rugger and footer
  • "er", a filler (linguistics)
  • Er (Cyrillic) (Р / р), a letter of the Cyrillic alphabet corresponding to the Latin letter "R"
  • Er, alternate spelling for Yer (Ъ / ъ), the hard-sign letter of the Cyrillic alphabet



Science and technology[edit]

Biology and medicine[edit]

Other uses in science and technology[edit]

Other uses[edit]

  • .er, country code top-level domain (ccTLD) for Eritrea
  • Er., Hebrew abbreviation for 'Eruvin, the second tractate of Moed
  • Earned run, a term in the game of baseball
  • Emergency Response, team or processes related to emergency services
  • English Reports of the English Courts from 1220 to 1866
  • Entre Ríos, several uses

See also[edit]