John McCarthy was the American computer scientist who coined the term “artificial intelligence” in 1955. He also created LISP, pioneered computer time-sharing and helped establish AI as an academic discipline. His ideas continue to influence how we think about AI today.
Born: September 4, 1927, Boston, Massachusetts, USA
Died: October 24, 2011, Stanford, California, USA
Field: Artificial Intelligence, Computer Science, Mathematics
Known for: Coining “Artificial Intelligence”, LISP, computer time-sharing
Who was John McCarthy?
Today, artificial intelligence is everywhere – from ChatGPT and AI-powered search to autonomous systems, medical diagnostics and computer vision. But the phrase “artificial intelligence” did not exist as a formal name for the field until computer scientist John McCarthy used it in 1955.
McCarthy was a mathematician and computer scientist who became one of the founding figures of artificial intelligence research. He believed that aspects of human intelligence could be described precisely enough for machines to simulate them. That idea helped launch an entirely new field of computer science.
John McCarthy and the birth of Artificial Intelligence
In 1955, McCarthy, together with Marvin Minsky, Nathaniel Rochester and Claude Shannon, proposed a summer research project at Dartmouth College.
The proposal used the term “artificial intelligence” and suggested that learning, reasoning and other aspects of intelligence could potentially be described with enough precision for machines to reproduce them.
The Dartmouth Summer Research Project on Artificial Intelligence, held in 1956, became a landmark event in the history of AI. It brought researchers together to investigate a question that sounds surprisingly modern, such as:
Can machines be made to perform tasks that we associate with human intelligence?
Stanford describes McCarthy as one of the founders of AI and confirms that he coined the name in 1955.
McCarthy built the first AI research tools
McCarthy’s influence on computer science went far beyond the phrase “artificial intelligence.” In 1958, he developed LISP, a programming language designed around symbolic expressions and list processing.
LISP became deeply associated with early artificial intelligence research and was used for decades in work involving symbolic reasoning, problem solving and knowledge representation. The language was radically different from the programming environments most people use today, but its influence on AI research was enormous.
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John McCarthy and computer time-sharing
McCarthy also helped pioneer the idea of ‘time-sharing’. At a time when computers were enormously expensive, machines typically used by one person at a time. McCarthy proposed ways for multiple users to interact with a computer.
The basic idea was simple that instead of one person waiting for the computer to finish, let many people use the machine interactively. Time-sharing became an important step in the evolution of interactive computing.
Stanford credits McCarthy with pioneering computer time-sharing decades before today’s cloud-computing era.
Building an AI Research Centre at Stanford
McCarthy joined Stanford’s faculty and became one of the central figures in developing its artificial intelligence research programme. He founded the Stanford Artificial Intelligence Laboratory (SAIL), which became an important centre for AI and computer science research.
His research focused heavily on the idea that machines could reason using formal logic and represented knowledge. McCarthy developed influential concepts involving logical reasoning, common-sense knowledge and knowledge representation.
John McCarthy’s connection to modern AI
The AI systems we use today are vastly different from the symbolic AI systems McCarthy worked on. Modern systems can learn patterns from enormous datasets, generate text and images, recognise speech and perform tasks that would have seemed extraordinary in the 1950s.
Some questions McCarthy was interested in remain central to artificial intelligence even today:
– How should machines represent knowledge?
– How can machines reason?
– Can computers understand context and common sense?
– What does it actually mean for a machine to be intelligent?
Quick Facts About John McCarthy
- Born: September 4, 1927
- Died: October 24, 2011
- Coined the term “artificial intelligence” in 1955.
- Helped establish the 1956 Dartmouth AI workshop.
- Created the programming language LISP.
- Pioneered computer time-sharing.
- Founded the Stanford Artificial Intelligence Laboratory.
- Received the ACM Turing Award in 1971.
- Received the Kyoto Prize in 1988.
- Received the U.S. National Medal of Science in 1990.
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