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Quest Diagnostics Inc is a leading independent provider of diagnostic testing, information, and services in the us. The company generates over 95% of its revenue through clinical testing, anatomic pathology, esoteric testing, and substance abuse testing with specimens collected at its national network of roughly 2,300 patient service centers, as well as multiple doctors offices and hospitals. The firm also runs a much smaller diagnostic solutions segment that provides clinical trials testing, risk-assessment services, and information technology solutions.
Western Digital is a leading, vertically integrated supplier of hard disk drives. The HDD market is a practical duopoly with, Western Digital and Seagate being the two largest players. Western Digital designs and manufacturers its HDDs, with much of the manufacturing and workforce located in Asia. The primary consumers of HDDs are data centers.