As of 2016, the Society had published 347 volumes in its Original Series; 126 volumes in its Extra Series, published between 1867 and 1935, comprising texts previously printed, but only in unsatisfactory or rare editions; and 25 volumes in its Supplementary Series, an occasional and irregular series initiated in 1970. The Society keeps the majority of its older publications in print, except those which have been superseded by subsequent editions. Volumes are now published on behalf of the Society by Oxford University Press.[2]