Porto Editora is the largest Portuguese publisher with a consolidated turnover of more than 90M € in 2010.^{[citation needed]} It is the leading educational publisher in Portugal^{[1][verification needed]} in the areas of educational books, dictionaries and multimedia products, both off-line and on-line. Porto Editora was founded in 1944 in Porto by a group of teachers within different areas of education.^{[citation needed]}

This article relies excessively on references to primary sources. (August 2009)