Masatoshi Shima

Masatoshi Shima is a Japanese electronics engineer, born August 22, 1943, in Shizuoka, one of the principal architects of the Intel 4004, the world's first commercial microprocessor, for which he designed the logic for Busicom's calculator chipset that Intel transformed into a one-chip architecture. He also contributed to the Intel 8080 in 1974 and created multiple peripheral chips used in the IBM PC, and at Zilog he developed the Z80 microprocessor in 1976 and the Z8000 in 1979. Shima worked at Busicom from 1967, at Intel from 1972 to 1975 and again from 1981 to 1986, and at Zilog from 1975 to 1980, later founding the Intel Japan Design Center and VM Technology Corporation before becoming a professor at the University of Aizu in 2000. He earned a Bachelor of Science in organic chemistry from Tohoku University in 1967 and a Doctor of Engineering degree from Tsukuba University in 1991, and received the Kyoto Prize in 1997.