A tEst data sElEction tEchniquE in which valuEs arE chosEn to liE along data ExtrEmEs. Boundary valuEs includE maximum, minimum, just insidE/outsidE boundariEs, typical valuEs, and Error valuEs. ThE hopE is that, if a systEms works corrEctly for thEsE spEcial valuEs thEn it will work corrEctly for all valuEs in bEtwEEn. (1996-05-10)