SORT or Statistics and Operations Research Transactions is a peer-reviewed open access scientific journal that publishes papers related to statistics. It is published by the Institut d'Estadística de Catalunya, the statistical office of Catalonia, in English with a brief summary in Catalan. The journal was established in 2003, when it replaced the journal Qüestiió (Quaderns d'Estadística i Investigació Operativa, 1977-2002). It publishes two issues each year, and is available online as open access.