Editing Intel 4004 (section)

==Historical documents==
===Earliest documents on the gate technology that enabled the 4004===

*Faggin, F., Klein, T., and Vadasz, L.: Insulated Gate Field Effect Transistor Integrated Circuits with Silicon Gates.[http://www.intel4004.com/images/iedm_covart.jpg Cover and abstract of the IEDM (International Electron Devices Meeting) Program (October 1968)]. The Silicon Gate Technology (SGT), created at Fairchild Semiconductor in 1968, was first presented by its co-inventor and developer, Federico Faggin, at the IEDM on October 23, 1968, in Washington, D.C. It was the only commercial process technology for the fabrication of MOS integrated circuits with self-aligned gate that was later universally adopted by the semiconductor industry. The SGT was the first technology to produce commercial dynamic RAMs, CCD image sensors, non volatile memories and the microprocessor, providing for the first time all the fundamental elements of a general purpose computer with LSI integrated circuits.
*Federico Faggin and Thomas Klein.: "A Faster Generation of MOS Devices with Low Thresholds is Riding the Crest of the New Wave, Silicon-Gate IC's".[http://www.intel4004.com/images/elect_cov_pg1.jpg Cover of Electronics Magazine (29 September 1969)]. The Electronics article introduces the Fairchild 3708, designed by Federico Faggin in 1968. It was the world's first commercial integrated circuit using the Silicon Gate Technology, proving its viability, and it was the first application of the new technology.
*F. Faggin, T. Klein: Silicon-Gate Technology. "Solid State Electronics", 1970, Vo. 13, pp.&nbsp;1125–1144

===Earliest documents on the Intel 4004===
*[http://www.intel4004.com/sign.htm Initials F.F. (Federico Faggin) on the 4004 design (1971)]. The 4004 bears the initials F.F. of its designer, Federico Faggin, etched on one corner of the chip. Signing the chip was a spontaneous gesture of proud authorship and was also an original idea imitated after him by many Intel designers.
*F. Faggin and M. E. Hoff: "Standard parts and custom design merge in four-chip processor kit". Electronics/April 24, 1972, pp.&nbsp;112–116. Reprinted on pp.&nbsp;6–27 to 6–31 of [https://web.archive.org/web/20110323004736/http://www.bitsavers.org/pdf/intel/_dataBooks/MemoryDesignHandbook_Aug73.pdf ''The Intel Memory Design Handbook: August 1973''].
*F. Faggin, M. Shima, M. E. Hoff Jr., H. Feeney, S. Mazor: "The MCS-4—An LSI micro computer system". IEEE '72 Region Six Conference. Reprinted on pp.&nbsp;6–32 to 6–37 of [https://web.archive.org/web/20110323004736/http://www.bitsavers.org/pdf/intel/_dataBooks/MemoryDesignHandbook_Aug73.pdf ''The Intel Memory Design Handbook: August 1973''].
*[http://www.computerhistory.org/revolution/digital-logic/12/285/1534 Busicom 141-PF Printing Calculator Engineering Prototype (1971)]. (Gift of Federico Faggin to the Computer History Museum, Mountain View, CA). The CHM collection catalog shows pictures of the engineering prototype of the Busicom 141-PF desktop calculator. The engineering prototype used the world's first microprocessor to have ever been produced. This one-of-a-kind prototype was a personal present by Busicom's president Mr. Yoshio Kojima to Federico Faggin for his successful leadership of the design and development of the 4004 and three other memory and I/O chips (the MCS-4 chipset). After keeping it in his home for 25 years, Faggin donated it to the CHM in 1996.
*Faggin, F.; Capocaccia, F. "A New Integrated MOS Shift Register", Proceedings XV International Electronics Scientific Congress, Rome, April 1968, pp.&nbsp;143–152. This paper describes a novel static MOS shift register, developed at SGS-Fairchild (now ST Micro) at the end of 1967, before Federico Faggin joined Fairchild's R&D in Palo Alto (Ca) in February 1968. Faggin later used this new shift register in the MCS-4 chips, including the 4004(1970).