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Teradyne provides testing equipment, including automated test equipment for semiconductors, system testing for hard disk drives, circuit boards, and electronics systems and wireless testing for devices. The firm entered the industrial automation market in 2015, into which it sells collaborative and autonomous robots for factory applications. Teradyne serves numerous end markets and geographies directly and indirectly with its products, but its most significant exposure is to semiconductor testing. Teradyne serves vertically integrated, fabless, and foundry chipmakers with its equipment.
Seagate is a leading supplier of hard disk drives for data storage to the enterprise and consumer markets. It forms a practical duopoly in the market with its chief rival, Western Digital; they are both vertically integrated.