# Alan Turing

> English computer scientist (1912–1954)

**Wikidata**: [Q7251](https://www.wikidata.org/wiki/Q7251)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Alan_Turing)  
**Source**: https://4ort.xyz/entity/alan-turing

## Summary

Alan Turing was born on June 23, 1912, in Maida Vale, and died from cyanide poisoning on June 7, 1954, in Wilmslow[1][2][3][4][5][6][7][8][9][10][11][12][13][1][2][3][4][5][6][7][8][9][10][11][12][14]. He was buried at Woking Crematorium[15][16]. A citizen of the United Kingdom, he was the son of Julius Mathison Turing and Ethel Sara Stoney and identified with atheism[1][1][17]. Turing was educated at Hazlehurst Community Primary School, Sherborne School, King's College, and Princeton University[1][4].He worked as a computer scientist, mathematician, university teacher, cryptographer, logician, and statistician[18][19]. His employers included the University of Cambridge (1934–1937), Government Communications Headquarters (1938–1945), National Physical Laboratory (1945–1947), and Victoria University of Manchester (1948–1952)[1][4]. He was influenced by Max Newman. His notable works include On Computable Numbers, with an Application to the Entscheidungsproblem, Computing Machinery and Intelligence, Intelligent Machinery, the halting problem, the Turing machine, and the Turing test[1].During his career, Turing received the Smith's Prize, was made an Officer of the Order of the British Empire, and became a Fellow of the Royal Society[15][4][20].

## Summary
Alan Turing was an English computer scientist (1912–1954) best known for his foundational work in theoretical computer science, particularly the development of the Turing machine and the Turing test, which laid the groundwork for artificial intelligence. His contributions to cryptography, including breaking the Enigma code during World War II, also made him a key figure in secure communication techniques.

## Biography
- Born: 1912-06-23, Maida Vale, United Kingdom
- Nationality: United Kingdom
- Education:
  - Sherborne School (1926–1931)
  - King's College, Cambridge (1931–1934)
  - Princeton University (1936–1938)
- Known for: Pioneering theoretical computer science, cryptography, and artificial intelligence
- Employer(s):
  - Government Communications Headquarters (1938–1945)
  - National Physical Laboratory (1945–1947)
  - Victoria University of Manchester (1948–1952)
- Field(s): Computer science, cryptography, mathematics, logic

## Contributions
Alan Turing made groundbreaking contributions to computer science, cryptography, and artificial intelligence. His most famous work includes the Turing machine (1936), a theoretical model of computation that defined computability, and the Turing test (1950), a method for evaluating machine intelligence. Turing also developed the universal Turing machine, which could simulate any other Turing machine, and the Symmetric Turing machine, which improved upon earlier models. His research on the halting problem and the Church–Turing thesis further advanced the field of mathematical logic. In cryptography, Turing played a crucial role in breaking the Enigma code during World War II, which significantly aided Allied efforts. His work on the ENIAC coding system (1943) also contributed to early programming languages. Turing's publications, such as "On Computable Numbers" and "Computing Machinery and Intelligence," remain foundational texts in computer science and artificial intelligence.

## FAQs
### Q: What is Alan Turing best known for?
A: Alan Turing is best known for his work in theoretical computer science, including the Turing machine and the Turing test, which laid the foundation for artificial intelligence. He also made significant contributions to cryptography, particularly during World War II.

### Q: How did Alan Turing contribute to cryptography?
A: Turing played a crucial role in breaking the Enigma code during World War II, which significantly aided Allied efforts. His work at the Government Communications Headquarters (GCHQ) was instrumental in decrypting German messages.

### Q: What is the Turing test?
A: The Turing test is a method for evaluating machine intelligence proposed by Alan Turing in 1950. It involves a human evaluator judging natural language conversations between a human and a machine to determine if the machine can exhibit intelligent behavior indistinguishable from a human.

### Q: What was Alan Turing's educational background?
A: Turing attended Sherborne School from 1926 to 1931, King's College, Cambridge from 1931 to 1934, and Princeton University from 1936 to 1938. He earned a PhD from Princeton in 1938.

### Q: What was Alan Turing's cause of death?
A: Alan Turing died in 1954 due to cyanide poisoning, which was ruled as a probable suicide. He was cremated at Woking Crematorium in Surrey, England.

## Why They Matter
Alan Turing's work revolutionized computer science and artificial intelligence, providing the theoretical framework that underpins modern computing. His contributions to cryptography during World War II were critical in decrypting enemy communications, aiding Allied victory. The Turing machine and Turing test remain fundamental concepts in computer science and AI research. Turing's pioneering work laid the groundwork for the digital age, influencing countless researchers and developers. His legacy continues to inspire advancements in technology and theoretical computer science.

## Notable For
- Pioneered the Turing machine, a foundational model of computation
- Developed the Turing test, a benchmark for artificial intelligence
- Broke the Enigma code during World War II, aiding Allied efforts
- Authored key papers in mathematical logic and computer science
- Received the Fellow of the Royal Society in 1951
- Awarded the Officer of the Order of the British Empire in 1946

## Body
### Early Life and Education
Alan Mathison Turing was born on June 23, 1912, in Maida Vale, London, to Julius Mathison Turing and Ethel Sara Stoney. He attended Sherborne School from 1926 to 1931 and studied at King's College, Cambridge, from 1931 to 1934. Turing earned a PhD from Princeton University in 1938, where he studied under Alonzo Church.

### Theoretical Computer Science
Turing's most significant contribution to computer science was the Turing machine, introduced in 1936. This theoretical model of computation defined computability and laid the groundwork for modern computing. He also developed the universal Turing machine, which could simulate any other Turing machine, and the Symmetric Turing machine, which improved upon earlier models. Turing's work on the halting problem and the Church–Turing thesis further advanced the field of mathematical logic.

### Cryptography and World War II
During World War II, Turing played a crucial role in breaking the Enigma code at the Government Communications Headquarters (GCHQ). His work was instrumental in decrypting German messages, aiding Allied efforts. Turing's contributions to cryptography were recognized with the Officer of the Order of the British Empire in 1946.

### Artificial Intelligence
Turing proposed the Turing test in 1950 as a method for evaluating machine intelligence. The test involves a human evaluator judging natural language conversations between a human and a machine to determine if the machine can exhibit intelligent behavior indistinguishable from a human. This concept remains a benchmark for artificial intelligence research.

### Later Career and Legacy
After the war, Turing worked at the National Physical Laboratory from 1945 to 1947 and at the Victoria University of Manchester from 1948 to 1952. He was elected a Fellow of the Royal Society in 1951. Turing's work continued to influence computer science and artificial intelligence, and his legacy endures in the field.

### Personal Life and Death
Turing was openly homosexual, which was criminalized at the time. He was convicted of gross indecency in 1952 and sentenced to chemical castration. Turing died in 1954 due to cyanide poisoning, which was ruled as a probable suicide. He was cremated at Woking Crematorium in Surrey, England.

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