Intel also manufactures motherboard chipsets, network interface controllers and integrated circuits, flash memory, graphics chips, embedded processors and other devices related to communications and computing. Intel supplies microprocessors for computer system manufacturers such as Apple, Lenovo, HP, and Dell. 46 in the 2018 Fortune 500 list of the largest United States corporations by total revenue. It is the world's largest and highest-valued semiconductor chip manufacturer on the basis of revenue, and is the developer of the x86 series of microprocessors, the processors found in most personal computers (PCs). Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, in Silicon Valley.