Tom Kilburn (1921–2001) was a British engineer and co-inventor of the first working computer memory. Kilburn also designed and built the first stored-program computer and led a team that produced a succession of pioneering computers over the next 25 years. In December 1946, Kilburn joined Frederic Williams at the University of Manchester to develop an electronic storage system for computers. They invented the Williams tube, a storage device based on cathode-ray tubes. By June 1948, they incorporated it into the Small Scale Experimental Machine (SSEM), the world’s first working stored-program computer. In 1964, Kilburn created the first computer science department in the United Kingdom.

What is Tom Kilburn known for in the field of engineering?

Tom Kilburn, a British engineer, is renowned for co-inventing the first working computer memory and designing the first stored-program computer. In 1948, Kilburn, along with Frederic Williams, built the Small Scale Experimental Machine (SSEM), also known as "Baby," at the University of Manchester. The SSEM was the world's first working stored-program computer. Kilburn also led the team that developed the Manchester Mark I, the prototype for the Ferranti Mark I, the first commercial computer. In 1964, Kilburn established the first computer science department in the United Kingdom.

What major invention did Tom Kilburn help create?

Tom Kilburn, a British engineer, co-invented the first working computer memory and designed the first stored-program computer. In 1948, Kilburn, along with Frederic Williams, created the Small Scale Experimental Machine (SSEM), also known as the "Baby," at the University of Manchester. This was the first computer that stored instructions in its memory to perform tasks in sequence. Kilburn also led the team that developed the Manchester Mark I, the prototype for the Ferranti Mark I, the first commercial computer. Later, Kilburn contributed to the Atlas computer, which introduced multiprogramming and virtual memory.

How did Tom Kilburn help develop early computers?

Tom Kilburn, a British engineer, significantly contributed to early computer development. He co-invented the first working computer memory and designed the first stored-program computer. In 1948, with Frederic Williams, Kilburn built the Small Scale Experimental Machine (SSEM), also known as the "Baby," at the University of Manchester to test their cathode-ray tube storage system. The "Baby" was the world’s first working stored-program computer. By 1949, they expanded the "Baby" to create the Manchester Mark I, which featured a two-level store and instruction modification registers, which soon evolved into index registers. The British firm Ferranti then created the Ferranti Mark I based on Kilburn's Mark I.

What was the significance of the Manchester Baby computer that Kilburn worked on?

The Manchester Baby, or Small-Scale Experimental Machine (SSEM), built by Tom Kilburn and Frederic Williams in 1948, was the first working stored-program computer. It proved the effectiveness of the Williams tube, an electronic storage system they invented using cathode-ray tubes, which became a standard method of storage used by computers worldwide. The Manchester Baby paved the way for the Manchester Mark I, a full-size computer with features that became computer standards, and the first commercial computer, the Ferranti Mark I.

How did Tom Kilburn’s work influence modern computing?

Tom Kilburn, a British engineer, significantly influenced modern computing through his pioneering work at the University of Manchester. Kilburn co-invented the first working computer memory and designed the first stored-program computer, the Small Scale Experimental Machine (SSEM) , also known as "Baby". His innovations include the Williams tube , a storage device that became a standard method of storage used by computers worldwide until the mid-1950s, and the Manchester Mark I , which featured a two-level store and instruction modification registers that evolved into index registers. Kilburn also led the team that created Atlas, the first computer to employ multiprogramming and virtual memory.

Tom Kilburn

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Born:: August 11, 1921, Dewsbury, Yorkshire, England

Died:: January 17, 2001, Manchester (aged 79)

Title / Office:: Royal Society (1965)

Subjects Of Study:: Williams tube; stored-program concept

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Tom Kilburn

British engineer

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Who was Tom Kilburn?
Tom Kilburn (1921–2001) was a British engineer and co-inventor of the first working computer memory. Kilburn also designed and built the first stored-program computer and led a team that produced a succession of pioneering computers over the next 25 years.

In December 1946, Kilburn joined Frederic Williams at the University of Manchester to develop an electronic storage system for computers. They invented the Williams tube, a storage device based on cathode-ray tubes. By June 1948, they incorporated it into the Small Scale Experimental Machine (SSEM), the world’s first working stored-program computer.

In 1964, Kilburn created the first computer science department in the United Kingdom.
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1. Tom Kilburn
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What is Tom Kilburn known for in the field of engineering?
Tom Kilburn, a British engineer, is renowned for co-inventing the first working computer memory and designing the first stored-program computer. In 1948, Kilburn, along with Frederic Williams, built the Small Scale Experimental Machine (SSEM), also known as "Baby," at the University of Manchester. The SSEM was the world's first working stored-program computer. Kilburn also led the team that developed the Manchester Mark I, the prototype for the Ferranti Mark I, the first commercial computer. In 1964, Kilburn established the first computer science department in the United Kingdom.
2 Britannica Sources
1. computer: The first stored-program machines
2. Tom Kilburn
Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
What major invention did Tom Kilburn help create?
Tom Kilburn, a British engineer, co-invented the first working computer memory and designed the first stored-program computer. In 1948, Kilburn, along with Frederic Williams, created the Small Scale Experimental Machine (SSEM), also known as the "Baby," at the University of Manchester. This was the first computer that stored instructions in its memory to perform tasks in sequence. Kilburn also led the team that developed the Manchester Mark I, the prototype for the Ferranti Mark I, the first commercial computer. Later, Kilburn contributed to the Atlas computer, which introduced multiprogramming and virtual memory.
3 Britannica Sources
Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
How did Tom Kilburn help develop early computers?
Tom Kilburn, a British engineer, significantly contributed to early computer development. He co-invented the first working computer memory and designed the first stored-program computer. In 1948, with Frederic Williams, Kilburn built the Small Scale Experimental Machine (SSEM), also known as the "Baby," at the University of Manchester to test their cathode-ray tube storage system. The "Baby" was the world’s first working stored-program computer. By 1949, they expanded the "Baby" to create the Manchester Mark I, which featured a two-level store and instruction modification registers, which soon evolved into index registers. The British firm Ferranti then created the Ferranti Mark I based on Kilburn's Mark I.
2 Britannica Sources
1. computer: The first stored-program machines
2. Tom Kilburn
Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
What was the significance of the Manchester Baby computer that Kilburn worked on?
The Manchester Baby, or Small-Scale Experimental Machine (SSEM), built by Tom Kilburn and Frederic Williams in 1948, was the first working stored-program computer. It proved the effectiveness of the Williams tube, an electronic storage system they invented using cathode-ray tubes, which became a standard method of storage used by computers worldwide. The Manchester Baby paved the way for the Manchester Mark I, a full-size computer with features that became computer standards, and the first commercial computer, the Ferranti Mark I.
2 Britannica Sources
1. computer: The first stored-program machines
2. Tom Kilburn
Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
How did Tom Kilburn’s work influence modern computing?
Tom Kilburn, a British engineer, significantly influenced modern computing through his pioneering work at the University of Manchester. Kilburn co-invented the first working computer memory and designed the first stored-program computer, the Small Scale Experimental Machine (SSEM), also known as "Baby".

His innovations include the Williams tube, a storage device that became a standard method of storage used by computers worldwide until the mid-1950s, and the Manchester Mark I, which featured a two-level store and instruction modification registers that evolved into index registers. Kilburn also led the team that created Atlas, the first computer to employ multiprogramming and virtual memory.
3 Britannica Sources
Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Tom Kilburn (born August 11, 1921, Dewsbury, Yorkshire, England—died January 17, 2001, Manchester) was a British engineer and co-inventor of the first working computer memory. Kilburn also designed and built the first stored-program computer and led a team that produced a succession of pioneering computers over the next 25 years.

In 1942 Kilburn graduated from the University of Cambridge with a degree in mathematics. He immediately converted, however, to electronics research when he was recruited to join Frederic Williams’s wartime radar group at the Telecommunications Research Establishment (TRE). In December 1946 Williams left TRE to become a professor at the University of Manchester, and Kilburn accompanied him in order to help develop an electronic storage system for electronic computers. They devised a storage device—later known as the Williams tube—based on cathode-ray tubes. A working model was completed late in 1947, and by June 1948 they had incorporated it in a small electronic computer that they built to prove the device’s effectiveness. The computer was called the Small Scale Experimental Machine (SSEM) or just “Baby.” It was the world’s first working stored-program computer, and the Williams tube became one of the two standard methods of storage used by computers worldwide until the advent of magnetic-core storage in the mid-1950s. By April 1949 the SSEM had developed into a full-sized machine, and by October 1949 secondary storage had been added (using a magnetic drum). This machine, the Manchester Mark I, was the prototype for the Ferranti Mark I, manufactured by Ferranti Ltd. (See photograph.)

From 1951 Kilburn formally led the computer group within Williams’s electrical engineering department. In 1953 the group completed an experimental computer using transistors instead of vacuum tubes. In 1954 the group completed MEG, which provided floating-point arithmetic (calculations using exponential notation—e.g., 3.27 × 10¹⁷) and was manufactured by Ferranti as the Mercury beginning in 1957.

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In 1956 Kilburn started his most ambitious project, MUSE, renamed Atlas when Ferranti joined the project in 1959. In parallel with two similar projects in the United States (LARC and Stretch; see supercomputer) but largely independent of them, Atlas made the massive jump from running one program at a time to multiprogramming. With multiprogramming a computer can “interleave” several programs, allocating various computer resources (memory, storage, input, and output) to each program through an operating system. Atlas was also the first computer to employ a technique, now known as virtual memory or virtual storage, of using some slower external memory (such as magnetic drums) as though it were an extension of the computer’s faster internal memory. Operational by 1962, Atlas was probably the most sophisticated computer of its time.

In 1964 Kilburn created the first department of computer science in the United Kingdom. In 1966 he started his last computer project, MU5. Operational by 1972, MU5 pioneered an architecture geared to the requirements of high-level languages (languages with more humanlike syntax).

Kilburn was made a professor in 1960 and was elected a fellow of the Royal Society in 1965. He retired in 1981.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Encyclopaedia Britannica.

Tom Kilburn

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