ERO

ERO or Ero may refer to:

Science and technology

 * 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

Government

 * 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

Organizations

 * 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.

People

 * ERO (artist) (Dominique Philbert; 1967–2011), American graffiti artist
 * Ero (rapper) (born 1981), Polish rapper

Other uses

 * 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