The improvement of MOS coordinated circuit innovation during the 1960s prompted the creation of the microchip in the mid 1970s.[68][51] The main single chip was the Intel 4004, delivered in 1971. [68] It started with the "Busicom Project"[69] as Masatoshi Shima's three-chip CPU plan in 1968,[70] [69] before Sharp's Tadashi Sasaki thought about a solitary chip CPU plan, which he examined with Busicom and Intel in 1968.[71] The Intel 4004 was then planned and acknowledged by Federico Faggin at Intel with his silicon-door MOS technology, [68] alongside Intel's Marcian Hoff and Stanley Mazor and Busicom's Masatoshi Shima.[69] The chip prompted the advancement of microcomputers and PCs, and the microcomputer upheaval