When was the EDSAC invented?

One of the most significant early British digital computers is being rebuilt as part of the EDSAC Replica Project .

The original EDSAC computer , created in 1947 by a team led by Maurice Wilkes, ran its first successful program on May 6, 1949, at the Cambridge University Mathematical Laboratory, and operated continuously for almost ten years.

We are now initially targeting to have a workingreconstruction of EDSAC as it was in 1951 (when it was in everyday service at the University of Cambridge Mathematical Laboratory) operational by the end of 2019

The story of the project is being told through aseries of short videos

The EDSAC Replica Project is a registered charity and is affiliated to the UKsComputerConservation Society



The Electronic Delay Storage Automatic Calculator(EDSAC)was originally built in in theCambridge University Mathematical Laboratoryby a team lead by the lateProfessor Sir Maurice Wilkesimmediately following the Second World War

The first practical purpose stored program electronic computer is generally accepted as the EDSAC. Other, earlier machines wereeither dedicated to a single task (e.g.Colossusand code breaking) or were purely experimental (e.g. theManchester University “Baby” Small Scale Experimental Machine).

As head of the Mathematical Laboratory, Wilkes brief was to provide ‘mechanical’ aids that would assist mathematicians,scientists and engineers at the university to perform complex and time-consuming calculations He had observed research workers doing laborious computations with the aid of mechanical desk calculators and mathematical tables His prime motive in building EDSAC was to provide them with faster and better facilities

Instead of the few highly specialized acolytes who maintained the other early electronic computers, Wilkes’ vision was to build a computer that, unlike earlier devices, could be used by a wide range of university researchers. Instead of trying to advance technology, he wanted to build a computer that was usable and accessible. He used very conservative design principles to achieve that goal, and the end result was a dependable machine that performed important and useful work for the duration of its life. It typically worked 35 hours a week. Engineers were available all day to handle any issues that might arise. The computer could be used overnight by authorized users, but any problems had to be reported in the morning in order to be looked into.

Thermionic valves, which Wilkes was familiar with from his work on cutting-edge radar systems during the war, were the foundation of all computers of the era, including EDSAC. While traveling back from a crucial 1946 conference of American computing pioneers at the University of Pennsylvania, he sketched out the design’s main components during a five-day trip from the USA to the UK.

Bill Renwick, the Chief Engineer chosen by Wilkes, oversaw construction. A team quickly grew around Wilkes and Renwick as they refined the design and gradually brought EDSAC to life David Wheeler, Wilkes’ research assistant, made significant contributions as well at this point, coming up with many of the features that made the device usable by regular people.

EDSAC launched its first program on May 6th, 1949, and was quickly called upon to assist with university research. Over nine years later, EDSAC 2, which was created by the same team, replaced it as a computing service provider.

Due to the increase in computing power that EDSAC and EDSAC 2 provided during that time, a sizable number of users’ research was transformed and their horizons were expanded. Among them were three Nobel Prize winners in the future: John Kendrew and Max Perutz in chemistry for figuring out the structure of myoglobin, Andrew Huxley in medicine for analyzing excitation and conduction in nerves quantitatively, and Martin Ryle in physics for creating aperture synthesis for radio astronomy. In their acceptance speeches for the Nobel Prize, all cited EDSAC. In the gallery, you can view Professor Huxley’s EDSAC programming manual.

EDSAC and its numerous applications received praise and funding from outside sources. A large portion of the funding came from the catering business J Lyons, which later built the LEO I computer, the world’s first business computer, based on the EDSAC design.

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EDSAC was modest in terms of modern-day computers There were only 18operation codesand initially just 512 words of memory, later extended to 1024 Instructions were executed at a rate of approximately 650 per second Input was by punched paper-tape and output by teleprinter

Even though modern PCs can perform calculations millions of times more quickly than EDSAC, the human calculators using mechanical desk machines that were available at the time pale in comparison to EDSAC. According to estimates, EDSAC increased productivity by a factor of 1,500 and revolutionized the way that research at Cambridge University moved forward. Problems that had been thought to be either impossible or impractical could now be solved by researchers.

EDSAC Film from 1951.

Commentary by Maurice Wilkes from 1976 on the 1951 movie about the actual application of EDSAC:.

Project Aims

Project Aims

The project’s objective is to construct a real, functional recreation of the EDSAC computer and run a program on it in the same manner as when the original device first entered regular use for users in 1951.

Our target is to have it running fully by the end of 2019

The project has the following supporting objectives:

To provide a tangible demonstration of the achievements of the Cambridge pioneers

To celebrate the achievements of British scientific and technological contributions to the early development of computing

To assemble archive material relating to this historic machine and recapture the knowledge ofthe pioneers who developed and those that used it

To build as authentic a reconstruction as possible taking into account the availability of components and materials and modern safety standards

To undertake the work within the spirit of the designers and technology of the time

to create a functional artifact with a high educational value for students and the general public.

to inspire new students to major in computing and engineering while serving as a model of British engineering.

Once it is constructed and put into operation at The National Museum of Computing, to show the working machine to the public as often as is practical.

to purchase enough spares to keep the machine operating for the next 25 years.

To train a new generation of volunteers, unfamiliar with 1940s valve technology, to run, demonstrate and maintain it for the foreseeable future

Project Management.

Project Organisation


The EDSAC Replica Project is a UK registered charity number 1145823 Its trustees are Professors Andy Hopper and Peter Robinson (appointed by theUniversity of Cambridge), David Hartley and Kevin Murrell (appointed by theBCS, Chartered Institute for IT) and Dr Hermann Hauser and Dr Andrew Herbert (appointed by the Hauser-Raspe Foundation)

The UK Computer Conservation Society (CCS) has ties to the project.


Dr. Andrew Herbert was appointed project manager in October 2011. The chairman of Microsoft Research for Europe, the Middle East, and Asia, Andrew, had just stepped down from his position. He worked with Maurice Wilkes on the Cambridge CAP Computer in the 1970s and holds a PhD in computer science from the University of Cambridge.

Those Who Support And Sponsor.

When David Hartley was Chairman of the Computer Conservation Society (CCS) in 2010, he suggested building a functioning replica of EDSAC to commemorate the importance of the early computer development work done at Cambridge University. This came after the Manchester “Baby” reconstruction project at the Manchester Museum of Science and Industry was a success.

Hermann Hauser helped David get funding for this project through the Hauser-Raspe Foundation, and Hermann Hauser also gave him support. Google and a number of private individuals contributed extra funds.

We also want to thank the following businesses for their help and cooperation.

Teversham Engineering, a sheet metal design and production company in Cambridge.

Nearly 20 of our memory unit chassis were constructed to a very high standard by Marshall Amplification, Milton Keynes, using donated parts.

Project team for the EDSAC replica.

The EDSAC reconstruction is being built entirely by volunteers, apart from some specialist work such as sheet metalwork which is being done semi-commercially

The project’s technical leader is Chris Burton who also lead the team that built the replica of the Manchester ‘Baby’ machine

Although significant research had already been done by some important CCS members to locate archive material and determine the project’s viability, the first volunteer meeting was held in March 2012.

The EDSAC Volunteers’ First Meeting.

Recreating EDSAC

Recreating EDSAC


Information about EDSAC was found in the Cambridge University Library and the Cambridge University Computer Laboratory library, as well as in the possession of individuals

The original EDSAC was scrapped in the late 1950s and only three identical examples remain of one specific chassis type, out of a total of about 65 different chassis types, and140+ individual chassis in the original And no definitive record exists of the final as built design, either in terms of the circuitry or the physical layout of the machine The archive material that we have found so far spans the whole timescale of the original EDSAC project, from Wilkes first thoughts to final decommissioning

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Over the course of its nearly 10-year existence, EDSAC underwent numerous modifications. Our goal is to recreate EDSAC as it was around 1951, about two years after it ran its first program (on May 6, 1949), when most of the initial issues had been resolved and it was offering Cambridge University a dependable computing service.

To develop the logical and physical designs that we can reasonably confidently reflect EDSAC as it was in mid-1951, the project required extensive sleuthing.

Whenever possible, we used genuine materials and parts to construct the replica, with one notable exception. The EDSAC’s memory was built from mercury-filled delay line tubes, which took advantage of the sound wave’s relatively slow motion in the liquid metal. A true reconstruction of these tubes will be impossible due to cost and operational issues. Our alternative is to use magnetostrictive steel wire delay lines, a technology used in computers that came after EDSAC. These lines operate using similar physical principles and methods as acoustic delay lines and connect to the same circuits as the original mercury delay lines.

Technology has advanced astronomically in the 70 years since EDSAC began operating. As a result, it has become very difficult to locate original components or even their later replacements. We will list information about the harder-to-find parts that we still need to buy if we want to assemble a nearly exact replica of the original machine in the You Can Help section.

Construction and location.

The EDSAC replica is being built at TheNational Museum of Computing (TNMOC) located on Bletchley Park, the UKs WWII code-breaking centre and undoubtedly the spiritual home of computing in the UK The new EDSAC gallery was home to a Colossus code-breaking machine during WW2

It is being constructed entirely by volunteers, many of whom are in their 60s or 70s (some even older!) and have prior experience with outdated valve-based technology. Some of them will eventually train much younger volunteers so that the EDSAC replica can be kept in an operational state for many years to come.

It won’t be a purely static exhibit, as is TNMOC policy. Once finished, it will be turned on and used as frequently as is practical. The next generation of technologists and engineers will be inspired by and involved in schoolchildren, and special efforts will be made in this regard.

We encourage you to talk to the volunteers, ask them questions, and learn more about the project and the background of this very significant computer if you visit TNMoC at this time to see them at work debugging and commissioning EDSAC.

support for the EDSAC Project.

Helping the EDSAC Project

There are various ways in which you might be able to assist.

Financially assist the endeavor.

Offer your assistance with the project.

Invest Money.

The project still requires more funding than we have so far raised. It has a high profile and frequently receives excellent national and international media coverage.

Please get in touch with Andrew Herbert at [email protected] if you or your company is interested in providing financial support for this unusual endeavor. org.

Join The Team By Volunteering.

The EDSAC replica is now close to 100% physically complete, and we are in a very active commissioning phase debugging the individual chassis and testing sub-systems. Some circuits and individual components need to be changed. The most challenging issue is shaping and timing.

Only those over that age have the background in designing and constructing valve-based circuits, so the majority of our team of volunteers are past retirement age. We must now find younger volunteers with electronics expertise who can work with the current team to learn how to maintain EDSAC over the long term and perhaps even show it to the public as a functioning historical artifact.

Please send an email to [email protected] if you possess these qualifications and have the necessary free time and enthusiasm to dedicate to the project. org.

The Electro-Mechanical Storage and Control Company (EDSAC) was invented on October 1, 195
When was the EDSAC invented? :
The original EDSAC computer was designed in 1947 by a team led by Maurice Wilkes. It operated for almost 10 years, starting from its first successful program run on 6th May 1949.

What is full form EDSAC?

EDSAC is a computer that was built at the University of Cambridge, England, by Maurice Wilkes and others. It is a formal computing service that helps users perform calculations.

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Which generation computer is EDSAC?

1. Generation 1 was the first generation of people.

2. They were the first people to live on Earth.

Is EDSAC computer or calculator?

The Electronic Delay Storage Automatic Calculator (EDSAC) was developed at Britain’s Cambridge University in 1949. It became the first stored-program computer in regular use, heralding the transition from test to tool.

Additional Question — When was the EDSAC invented?

What ENIAC means?

ENIAC was the world’s first general-purpose computer. It was designed and built for the United States Army to calculate artillery firing tables. However, it quickly became popular because of its power and general-purpose programmability.

Who is the father of modern computer?

Charles Babbage
Computer / Inventor

Charles Babbage KH FRS was an English polymath. A mathematician, philosopher, inventor and mechanical engineer, Babbage originated the concept of a digital programmable computer.
Babbage is considered by some to be “father of the computer”.

What was EDSAC used for?

The EDSAC is a large-scale electronic calculating machine that uses ultrasonic delay units to store orders and numbers. It is serial in operation and works in the scale of two. Punched tape is used for input and a teleprinter for output.

Which was the first commercial computer?

The Univac 1 was the first computer to be widely known and popular, and it quickly became a favorite among scientists and students.

What is EDSAC and UNIVAC?

The Electronic Delay Storage Automatic Calculator is a computer that can store and calculate delay times. The UNIVAC is a universal automatic computer that can store and calculate delay times.

What was the first electronic computer used for?

The Electronic Numerical Integrator And Computer (ENIAC) was the very first electronic computer. It was designed primarily to calculate artillery firing tables to be used by the United States Army’s Ballistic Research Laboratory.

Which is most powerful computer?

According to Top500, which ranks computers around the world, as of November 2021, the Fugaku supercomputer located at RIKEN Centre for Computational Science in Kobe, Japan is the world’s fastest supercomputer.

What is the first name of computer?

ENIAC was the first programmable general-purpose electronic digital computer, built during World War II by the United States. John Mauchly, an American physicist, and J. Robert Oppenheimer, an American engineer, designed and built ENIAC.

Who was the first programmer?

Ada Lovelace was the first computer programmer, despite the fact that her Analytical Engine wasn’t ever manufactured.

Who created coding?

Historians recognise Ada Lovelace as the first computer programmer. Ada, born in 1815, studied mathematics and became highly unusual for a woman.

What is the first software?

Google released a tribute to the Manchester Baby, celebrating it as the “birth of software”. FORTRAN was developed by a team led by John Backus at IBM in the 1950s. The first compiler was released in 1957.

Who is mother of computer?

Ada Lovelace was a mathematician and writer who is most well-known for her work on Charles Babbage’s proposed mechanical general-purpose computer, the Analytical Engine.

Which is heart of computer?

CPU is the heart of any computer system.

Who is the father of mouse?

Computer mice and inventors have been working together for many years.

Who is the brain of computer?

The CPU is the part of a computer that processes input, stores data, and outputs results.

What is a CPU unit?

A CPU is a processor that helps run the computer’s operating system and apps.

Conclusion :

The EDSAC is an innovative trading system that has helped to increase the efficiency of the stock market. It was invented by two entrepreneurs, Dan Bonefeld and Jerrold Sussman, and has since been used by many businesses to trade products and services. By using the EDSAC, investors can save time and money while also increasing their chances of success. In order to become an EDSAC investor, you will need to follow some simple steps and make sure that you are compatible with the system. By doing so, you can get started in this growing industry today!

Dannie Jarrod

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