Waters is a holding company. Through its subsidiaries, Co. is a specialty measurement company. Co. primarily designs, manufactures, sells and services high performance liquid chromatography, ultra performance liquid chromatography and mass spectrometry technology systems and support products, including chromatography columns, other consumable products and post-warranty service plans. In addition, Co. designs, manufactures, sells and services thermal analysis, rheometry and calorimetry instruments through its Instruments product line. Co. is also a developer and supplier of software-based products that interface with its instruments, as well as other manufacturers' instruments.