What Is a Turing Machine? 🖥️ The Foundational Concept of Modern Computing
Discover how Alan Turing's groundbreaking 1936 invention laid the groundwork for today's computers and revolutionized computer science. Learn the basics of Turing Machines and their impact!

Quanta Magazine
52.4K views • Sep 5, 2025

About this video
In 1936, a 23-year-old British mathematician named Alan Turing revolutionized the future of computer science. While exploring the foundations of mathematics, Turing introduced a groundbreaking idea: a machine capable of computing any sequence—given enough time and memory. These theoretical devices, now known as Turing Machines, laid the foundation for modern computing.
A Turing Machine uses an infinite strip of tape divided into squares, each holding a symbol, and a read/write head that can read, write, and move left or right. Guided by simple rules, it can carry out any computation that today’s most advanced computers can perform.
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A Turing Machine uses an infinite strip of tape divided into squares, each holding a symbol, and a read/write head that can read, write, and move left or right. Guided by simple rules, it can carry out any computation that today’s most advanced computers can perform.
---------
Quanta Magazine is an editorially independent publication supported by the Simons Foundation. We focus on developments in mathematics, theoretical physics, theoretical computer science and the basic life sciences.
READ free math and science articles on the Quanta website: www.quantamagazine.org
LEARN about the Simons Foundation: www.simonsfoundation.org
FOLLOW our social channels:
- Instagram: quantamag
- Bluesky: @quantamagazine.bsky.social
- Facebook: quantanews
- X: quantamagazine
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Views
52.4K
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2.1K
Duration
3:00
Published
Sep 5, 2025
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