The Ferranti Mark 1, also known as the Manchester Electronic Computer in its sales literature, and thus sometimes called the Manchester Ferranti, was produced by British electrical engineering firm Ferranti Ltd. Among the world's first commercially available general-purpose digital computers. it was "the tidied up and commercialised version of the Manchester Mark I. The first machine was delivered to the University of Manchester in February 1951 (publicly demonstrated in July) ahead of the UNIVAC I, which was sold to the United States Census Bureau on 31 March 1951, although not delivered until late December the following year.