In 1991, the London Science Museum built a complete and working specimen of Babbage's Difference Engine No. 2, a design that incorporated refinements Babbage discovered during the development of the Analytical Engine.

Ada Lovelace's note G on the analytical engine from 1842 describes an algorithm for generating Bernoulli numbers with Babbage's machine.

* In common with many other complex mechanical devices, Charles Babbage's analytical engine used banks of cams to control each operation, i. e. it had a read-only control store.

British countess and mathematician Ada Lovelace is popularly credited as history's first programmer, as she was the first to express an algorithm intended for implementation on a computer, Charles Babbage's analytical engine, in October 1842, intended for the calculation of Bernoulli numbers.

Charles Babbage's analytical engine ( 1830s ) would have been the first Turing-complete machine if it had been built at the time it was designed.

* Ada Lovelace translates and expands Menabrea's notes on Charles Babbage's analytical engine, including an algorithm for calculating a sequence of Bernoulli numbers, regarded as the world's first computer program.

The concept that software might contain errors dates back to Ada Lovelace's 1843 notes on the analytical engine in which she speaks of the difficulty of preparing program " cards " for Charles Babbage's Analytical engine:

Among the most complex were Babbage's difference and analytical engines, which were mechanical versions of computers.

Exhibitions included such large pieces of machinery as parts of Charles Babbage's analytical engine, cotton mills, and maritime engines by the firm of Henry Maudslay, as well as a range of smaller goods including fabrics, rugs, sculptures, furniture, plates, silver and glass wares, and wallpaper.

Ironically, perhaps the Association's most momentous influence on science was in 1878 when a committee of the Association recommended against constructing Charles Babbage's analytical engine.

* Ada Lovelace translates and expands Menabrea ’ s notes on Charles Babbage's analytical engine, including an algorithm for calculating a sequence of Bernoulli numbers, regarded as the world's first computer program.

She is also considered to have been the world's first computer programmer, having written the first algorithm intended to be processed by a machine -- Charles Babbage's analytical engine.

She is credited as being the first programmer, having assisted in realising the potential of Babbage's analytical engine.

Ludgate's engine would be much smaller than Babbage's of about 8 cubic feet ( 230 L ) and hypothetically would be capable of multiplying two 20-decimal-digit numbers in about six seconds.

In 1991, a perfectly functioning difference engine was constructed from Babbage's original plans.

Built to tolerances achievable in the 19th century, the success of the finished engine indicated that Babbage's machine would have worked.

The London Science Museum ( London ) | Science Museum's difference engine, built from Babbage's design.

Although Babbage's design was technically feasible, no one had built a mechanical device to such exacting standards before, so the engine proved to be much more expensive than anticipated.

Inspired by Babbage's difference engine plans, Per Georg Scheutz built several difference engines from 1855 onwards, one of which was sold to the British government in 1859.

The difference engine and printer were constructed to tolerances achievable with 19th-century technology, resolving a long-standing debate whether Babbage's design would actually have worked.

A machine based on Babbage's difference engine was built in 1843 by Per Georg Scheutz and his son Edward.

1822: Charles Babbage | Babbage's Difference engine.

June 14: Charles Babbage | Babbage's Difference engine.

While at Clement's workshop he helped with the manufacture of Charles Babbage's calculating machine, the Difference engine.

In 2005, Tim Robinson displayed his own Meccano differential analyser at the Computer History Museum, at Mountain View, California, USA, and Robinson has also built and exhibited two models of Charles Babbage's difference engine, also using Meccano.

The Science Museum now holds a collection of over 300, 000 items, including such famous items as Stephenson's Rocket, Puffing Billy ( the oldest surviving steam locomotive ), the first jet engine, a reconstruction of Francis Crick and James Watson's model of DNA, some of the earliest remaining steam engines, a working example of Charles Babbage's Difference engine ( and the latter, preserved half brain ), the first prototype of the 10, 000-year Clock of the Long Now, and documentation of the first typewriter.

** Arithmetic logic unit, used in the context of Charles Babbage's Analytical engine, a 19th century concept of a computer

He was influential in publicising Charles Babbage's Difference engine.

The conversion of the original design drawings into drawings suitable for engineering manufacturers ' use revealed some minor errors in Babbage's design ( possibly introduced as a protection in case the plans were stolen ), which had to be corrected.

Although the " printer " is here referred to as such, its primary purpose is to produce stereotype plates for use in printing presses ; Babbage's intention being that the Engine's results be conveyed directly to mass printing.

This hiatus of 22 years coincides almost exactly with the period of time during which the British government financed the design of Charles Babbage's difference engine, which on paper was far more sophisticated than the Arithmometer but that couldn't be built with the technology of the time.

Joseph Clement ( 1779 – 28 February 1844 ) was a British engineer and industrialist, chiefly remembered as the maker of Charles Babbage's first Difference engine, between 1824 and 1833.

Around 1825, according to Charles Babbage's autobiography, he invented the thaumatrope, which was later commercially publicised by Dr. John Ayrton Paris ( to whom the invention is more usually attributed ).

British prizes for research spurred the development of an accurate, portable chronometer, which directly enabled reliable navigation and sailing on the high seas, and also funded Babbage's computer.

Ludgate also helped advance calculators by expanding Charles Babbage's design for the first programmable computer.

Silicon carbide is also then used as protection against armor-piercing shells developed to hit tanks that start life as American tractors, which use diesel engines developed thanks to funding from Krupp, who inspired Bismarck's welfare scheme based on Quetelet's statistics that inspired the Charles Babbage's difference engine, whose punch cards were used to rivet the " SS Great Eastern ," the monster ship that laid the transatlantic cable insulated with gutta-percha used to manufacture golf balls for factory managers in industrial Scotland, where James Watt had a run-in with Cavendish, whose protegee was James Macie aka James Smithson, who caused all the row in the capitol building, so the money got used to set up a world-renowned institution named after James Macie's new family name, which was Smithson: The institution known as the Smithsonian.

The historical difficulty in producing error free tables by teams of mathematicians and human " computers " spurred Charles Babbage's desire to build a mechanism to automate the process.

It was first described in 1837 as the successor to Babbage's Difference Engine, a design for a mechanical computer.

J. Presper Eckert and John W. Mauchly similarly were not aware of the details of Babbage's Analytical Engine work prior to the completion of their design for the first electronic general-purpose computer, the ENIAC.

Babbage's idea soon developed into a general-purpose programmable computer.

While it is theoretically possible to implement a full computer entirely mechanically ( as Babbage's design showed ), electronics made possible the speed and later the miniaturization that characterize modern computers.

Her work never ran because Babbage's machine was never completed to a functioning standard in her time ; the first programmer to successfully run a program on a functioning modern electronically based computer was pioneer computer scientist Konrad Zuse, who achieved this feat in 1941.

The modern notion of records in computer science, with fields of well-defined type and size, was already implicit in 19th century mechanical calculators, such as Babbage's Analytical Engine.

The first design for a program-controlled computer was Charles Babbage's Analytical Engine in the 1830s.

To supervise his collections Darwin had to return to London, and on Lyell's advice he planned to arrive on Friday 3 March 1837, in time for one of Charles Babbage's Saturday parties, talking shops about the latest developments " brilliantly attended by fashionable ladies, as well as literary and scientific gents " and " a good mixture of pretty women ", bankers and politicians, where Babbage promoted such projects as his mechanical computer.