Then
His wartime code-breaking helped shorten the war, and his 1936 paper supplied the theoretical basis for the stored-program computer.
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Alan Turing
1912 - 1954 · England
Alan Turing imagined the “universal machine” — a single device that could compute anything computable — and helped build the earliest computers and code-breaking machinery.
- Mathematics
- Technology
- Contemporary
Lived
1912 - 1954
Era
Contemporary
Primary field
Mathematics
Signature idea
Conceptualised the Turing machine and artificial intelligence
Their place in history
1912 - 1954
The question they asked
What, exactly, can be calculated, and can one machine carry out any calculation?
The Contribution
What this scientist actually did — precisely and plainly.
He defined the theoretical Turing machine, proposed tests for machine intelligence, and played a decisive wartime role breaking the Enigma cipher.
How the Work Advanced Knowledge
The tools, experiments and reasoning behind the discovery.
He moved abstract mathematics and logic into engineering reality, designing and programming the Bombe and later the ACE computer.
Why It Mattered Then / Today
From their own moment in history to the world we live in now.
Today
Every modern computer is a Turing machine in principle; his Turing test still frames AI discussions, and his life shaped the fight for fair treatment of LGBTQ+ people.
Important Works or Discoveries
Landmarks that carried the idea into the world.
- On Computable Numbers (1936)
- The Bombe at Bletchley Park
- Computing Machinery and Intelligence (1950)
We can only see a short distance ahead, but we can see plenty there that needs to be done.
Sources
Where this profile was verified.
Last reviewed: 2026-09-22
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