Ada Lovelace and the first program

In short: In 1843 Ada Lovelace wrote an algorithm for Charles Babbage’s planned Analytical Engine and is therefore regarded as the first programmer.

In more detail: Augusta Ada King, Countess of Lovelace (1815–1852), was a mathematician and the daughter of the poet Lord Byron. Her mother encouraged her mathematical education. In 1833 she met the inventor Charles Babbage, who worked on mechanical calculating machines.

In Depth

The Analytical Engine

Babbage designed the Analytical Engine, a mechanical, universally programmable machine with an arithmetic unit (“mill”), memory (“store”) and punched cards for programs (modelled on Jacquard looms). It was never fully built, but its concept resembles modern computers.

The notes of 1843

Ada translated an article by the Italian Luigi Menabrea about the machine and added extensive notes, longer than the text itself. In Note G she described a method for computing Bernoulli numbers on the machine, a sequence of steps with loops often called the first computer program. She also recognised that such a machine could process not only numbers but arbitrary symbols, such as music.

Assessment and legacy

Historians dispute how much of the ideas came from her and how much from Babbage; it is clear that she described the potential beyond mere calculation early. She also stressed that the machine could not “originate” anything but only do what it is ordered to, a thought still quoted in the AI debate (“Lovelace objection”). The programming language Ada and Ada Lovelace Day (second Tuesday in October) commemorate her.

Further reading

Other early pioneers: Grace Hopper (compiler, COBOL), Alan Turing, Konrad Zuse, Margaret Hamilton (Apollo software), Katherine Johnson. The history of computing was long shaped by women, even if they were often overlooked.

See also: History of AI