Even as a chip maker, I.B.M. has moved aggressively beyond the PC industry, focusing on making the processors for video game consoles from Nintendo, Microsoft and Sony, and specialized chips for other uses, like the Internet router computers made by Cisco Systems and cellphone technology by Qualcomm. I.B.M. also uses its Power microprocessors in many of its own server computers, which run corporate networks.
By contrast, the chips I.B.M. makes for Apple represent less than 2 percent of chip production at its largest factory in East Fishkill, N.Y. And while the microelectronics business as a whole is strategically important for I.B.M., it is a small part of the revenue of a company that increasingly focuses on services and software. A. M. Sacconaghi, an analyst for Sanford C. Bernstein & Company, estimates that the company's technology group - mostly microelectronics - will account for less than 3 percent of I.B.M.'s revenues and 2 percent of its pretax income this year.
I.B.M. supplies about 50 percent of the microprocessors used by Apple, providing them for desktop and server computers. Freescale makes the processors used in Apple's notebook and new Mac mini computers.