Charles H. Moore

Charles Havice "Chuck" Moore II[4] (born 1938) is an American computer engineer and programmer, best known as the inventor of the Forth programming language.

Charles H. Moore
Moore in c. 2006 or earlier
Born1938 (age 8081)[1]
Known forForth programming language
Spouse(s)Winifred Bellis (m. 1967–2005, her death)[2]
ChildrenEric O Moore[3]


In 1968, while employed at the United States National Radio Astronomy Observatory (NRAO), Moore invented the initial version of the Forth language to help control radio telescopes. In 1971 he co-founded (with Elizabeth Rather) FORTH, Inc., the first, and still one of the leading, purveyors of Forth solutions. During the 1970s he ported Forth to dozens of computer architectures.

In the 1980s, Moore turned his attention and Forth development techniques to CPU design, developing several stack machine microprocessors and gaining several microprocessor-related patents[5] along the way. His designs have all emphasized high performance at low power usage. He also explored alternate Forth architectures such as cmForth and machine Forth, which more closely matched his chips' machine languages.

In 1983 Moore founded Novix, Inc., where he developed the NC4000 processor. This design was licensed to Harris Semiconductor which marketed it as the RTX2000, a radiation hardened stack processor which has been used in numerous NASA missions. In 1985 at his consulting firm Computer Cowboys, he developed the Sh-Boom processor. Starting in 1990, he developed his own VLSI CAD system, OKAD, to overcome limitations in existing CAD software. He used these tools to develop several multi-core minimal instruction set computer (MISC) chips: the MuP21 in 1990 and the F21 in 1993.

Moore was a founder of iTv Corp,[6][7] one of the first companies to work on internet appliances. In 1996 he designed another custom chip for this system, the i21.[8][9]

Moore developed the colorForth dialect of Forth, a language derived from the scripting language for his custom VLSI CAD system, OKAD. In 2001, he rewrote OKAD in colorForth and designed the c18 processor.

In 2005, Moore co-founded and became Chief Technology Officer of IntellaSys, which develops and markets his chip designs, such as the seaForth-24 multi-core processor.

In 2009, he co-founded and became CTO of GreenArrays, Inc which is marketing the GA4 and GA144 multi-computer chips.


  • Elizabeth D. Rather, Donald R. Colburn, Charles H. Moore, "The Evolution of Forth", "History of Programming Languages" edited by Thomas J. Bergin and Richard G. Gibson, Addison-Wesley, 1996, pages 625–670, chapter 13, ISBN 0-201-89502-1.

See also


  1. Chuck Moore's Biography Archived 9 July 2008 at the Wayback Machine, colorforth
  2. Winifred Bellis Moore Archived 1 April 2009 at the Wayback Machine, 10 October 1932 – 11 January 2005
  3. Eric O Moore Archived 13 May 2009 at the Wayback Machine, born 1969 in Amsterdam NY
  4. LaForest, Charles Eric (2007). "Second-Generation Stack Computer Architecture". UWSpace. University of Waterloo. Retrieved 3 April 2018.
  5. Hewlett-Packard Licenses Moore Microprocessor Patent Portfolio, LinuxElectrons, 23 January 2006, archived from the original on 26 December 2007.
  6. "iTV Corp. Develops New Low-Cost, High-Speed Computer Chip", Business Wire, 3 June 1996.
  7. The iTV Corporation, archived from the original on 22 September 2001
  8. "i21 Processor". Archived from the original on 23 April 1999. Retrieved 24 March 2017.CS1 maint: BOT: original-url status unknown (link), High-performance low-cost Internet access multiprocessor, iTv Corp
  9. Mailing List: fire-side-chat, From:Jeff Fox, Sun, 17 November 1996 02:22:00 -0800, "...This box will contain iTV's i21 chip designed by Chuck Moore.."
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