 In reality, by breaking the intrinsic links between a topic in "Propædia" with its associated EB articles the intended function (or usefulness) of "Propædia" is hindered significantly.On March 14, 2012, Britannica announced it would not be printing any more sets of its paper version, which accounted for less than 1 percent of its sales, and would instead focus on its DVD and on-line versions.It had not printed any new sets since 2010.