A rack device includes one or more shelves, each having one or more collars for being detachably secured onto one or more posts with one or more sleeves. The first lens has a biconvex shape and a positive refracting power. A plurality of horizontal shelves are mounted in the container housing parallel to each other and a plurality of vertical support members engage the shelves to support said shelves and serve as spacers for said shelves and to align the allograft tissue packages in a vertical and horizontal rows. The memory includes word lines coupled to the plurality of strips in the plurality of levels. Each of the M pipelined memory stages outputs a stage search result. Identify patient clusters with unusual patterns.