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John Cocke

IBM researcher who invented RISC computer architecture

30 May 1925 – 16 July 2002 United States Verified by our editors
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Lived
77 yrs
1925 – 2002
Works listed
2
Computer architecture, Parsing algorithm
Honours
4
Most recent 1994
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John Cocke was an American computer scientist at IBM who pioneered RISC (reduced instruction set computer) architecture and optimising compilers. RISC ideas power the processors in almost every smartphone. He received the Turing Award in 1987.

Biography

Background

Cocke studied mechanical engineering and earned a PhD in mathematics at Duke University. He joined IBM in 1956 and spent his whole career there.

Fast machines

He worked on the IBM Stretch supercomputer and on the design of processors that could execute several instructions at once, early ideas behind modern superscalar chips.

RISC

In the mid-1970s Cocke led the IBM 801 project, which showed that a processor with a small set of simple instructions, together with a clever compiler, could outperform complex designs. This reduced instruction set approach was adopted by IBM’s POWER chips, by Sun, MIPS and ARM, and is now in billions of devices.

Compilers

Cocke, with Frances Allen and others, developed techniques to optimise code automatically. He received the Turing Award in 1987, the National Medal of Technology in 1991 and the National Medal of Science in 1994. He died in 2002.

Timeline

  1. 1925

    Born in Charlotte, North Carolina, United States

  2. 1956

    Joins IBM

  3. 1961

    IBM Stretch delivered

  4. 1975

    IBM 801 RISC project begins

  5. 1987

    Turing Award

  6. 1991

    National Medal of Technology

  7. 1994

    National Medal of Science

  8. 2002

    Died, aged 77

Notable works

  • 1980

    IBM 801 Computer architecture

  • 1960

    Cocke–Younger–Kasami algorithm Parsing algorithm

    Co-discovered independently.

Awards and honours

  • Eckert–Mauchly Award

    1985

  • Turing Award

    1987

  • National Medal of Technology

    1991

  • National Medal of Science

    1994

Did you know?

  1. 1

    Colleagues said many of his ideas came during long conversations and were written up by others.

  2. 2

    The CYK parsing algorithm partly bears his name.

  3. 3

    IBM’s POWER and PowerPC chips descend from his 801 work.

Connections

Related people

Also born on 30 May

Frequently asked

Who is John Cocke?

John Cocke was an American computer scientist at IBM who pioneered RISC (reduced instruction set computer) architecture and optimising compilers. RISC ideas power the processors in almost every smartphone. He received the Turing Award in 1987.

When did John Cocke die?

John Cocke died on 16 July 2002 at the age of 77.

Where is John Cocke from?

John Cocke was born in Charlotte, North Carolina, United States.

What is John Cocke known for?

John Cocke is best known for RISC architecture; IBM 801; optimising compilers; Turing Award 1987.

What awards has John Cocke received?

Notable honours include Eckert–Mauchly Award (1985), Turing Award (1987), National Medal of Technology (1991), National Medal of Science (1994).

References

  1. John Cocke (computer scientist) — Wikipedia. Wikipedia. Retrieved 4 November 2026.
  2. John Cocke (computer scientist) — Britannica. Encyclopaedia Britannica. Retrieved 4 November 2026.
  3. John Cocke (computer scientist) (Q92632) — structured data. Wikidata. Retrieved 4 November 2026.

Includes material from the Wikipedia article “John Cocke (computer scientist)”, licensed under CC BY-SA 4.0. That text is available under the same licence. Learn more

External links

Wikipedia
Filed under Computer architectureIBMRISCTuring Award Computer ScientistEngineer

About this profile

Cite this page

“John Cocke.” TrackFame, last updated 4 November 2026. https://trackfame.com/person/john-cocke

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