Varian Medical Systems, Inc. engages in the design, manufacture, sale, and service of equipment and software products to treat cancer with radiation. The company operates in two segments, Oncology Systems and X-ray Products. The Oncology Systems segment designs, manufactures, sells, and services hardware and software products for treating cancer with radiation, including linear accelerators, treatment simulation and verification products, information management and treatment planning software, and other accessory products and services. This segment’s customers include comprehensive cancer treatment clinics, university research and community hospitals, private and governmental institutions, healthcare agencies, doctors’ offices, and cancer care clinics worldwide. The X-ray Products segment manufactures and sells X-ray imaging components and subsystems, such as X-ray tubes for use in computed tomography, scanning, radioscopic/fluoroscopic imaging, mammography, special procedures, and industrial applications; and flat panel imaging products for digital X-ray image capture. This segment’s products are sold to original equipment manufacturers and end-users. The company markets its products through independent distributors in North America, Europe, Australia, Asia, and Latin America. Varian Medical Systems was incorporated as Varian Associates, Inc. in 1948 and is based in Palo Alto, California.