scientific and laboratory apparatus and instruments; namely, liquid sample processors for automated handling of liquids; apparatus for carrying out assays or diagnostic tests comprised of syringe pumps, vacuum pumps, sample probes, test tubes, dilution tubes, sample tube racks, sample tube carrousels, sample plate racks, reagent racks, magnetic stirrers, laser bar code scanners and, optionally, data processing computers; computer applications software for use with liquid sample processors for automated handling of liquids in carrying out assays or diagnostic tests