 When, in 1980, Nixdorf Computer bought TCSC, Nixdorf sought to continue the licensing arrangement; ADR and NCSC went to court in a dispute over whether the licensing arrangement was terminated by the acquisition.ADR and Nixdorf settled out of court in 1981, with an agreement that Nixdorf could continue to resell ADR's products.ADR bought Massachusetts Computer Associates, also known as Compass, in the late 1960s.