Sociedad Española de Estadística y de Investigación Operativa is the professional association in Spain founded in 1962.
According to PR-model, seio.es is ranked 1,153,425th in multilingual Wikipedia, in particular this website is ranked 138,230th in Russian Wikipedia.
The website is placed before lumerias.com and after roamtheworldcellphones.com in the BestRef global ranking of the most important sources of Wikipedia.