ERO

ERO or Ero may refer to:

• Easily Recoverable Object, a subclass of near-Earth object that is easily recoverable
• Early Release Observations, of the James Webb Space Telescope
• Edge recombination operator, an operator in genetic algorithms
• Elementary row operations, an operation performed on the rows of an elementary matrix in mathematics
• Ero (spider), a genus of pirate spiders
• Extremely Red Object, astronomical source of radiation with extreme redshift

• Education Review Office (New Zealand), an agency of the New Zealand government
• Electoral registration officer, in the UK, a person appointed by a local authority to compile and maintain the electoral roll
• Electronic return originator, an authorized IRS e-file provider which originates the electronic submission of a return
• Enforcement and Removal Operations, a section of U.S. Immigration and Customs Enforcement
• The Emergency Regulations Ordinance (Cap. 241) of Hong Kong

• Eugenics Record Office (1910–1939), a center for eugenics and human heredity research in America
• ICFTU European Regional Organisation (1950–1969), regional confederation of trade unions
• European Radiocommunications Office, former name of the European Communications Office, part of the European Conference of Postal and Telecommunications Administrations
• Emergency response officers (EROs) are people who are trained to be the first line of response in any emergency situation.

• Ero, an abbot in The Legend of Ero of Armenteira
• Končar-Arma ERO, a Croatian submachine gun similar to the Israeli-made Uzi submachine gun

• Eros (disambiguation)
• EROS (disambiguation)