Ada Lovelace

Augusta Ada King, Countess of Lovelace, was born on 10 December 1815 in London. She was the only legitimate child of the poet George Gordon Byron, though her parents separated shortly after her birth and she never knew her father, who died when she was eight. Her mother, Anne Isabella Milbanke, ensured that Ada received an education that emphasised mathematics and science, which was unusual for women of the period.

As a young woman, Lovelace came into contact with scientists and mathematicians in the social circles she frequented, including Mary Somerville, the Scottish mathematician and scientist, through whom she met Charles Babbage in 1833. Babbage was developing his concept for a mechanical computing device, the Analytical Engine, which was intended to perform general calculations and to be programmable using punched cards.

In 1842 and 1843, Lovelace translated from French into English an article by the Italian mathematician Luigi Menabrea describing Babbage's Analytical Engine. At Babbage's suggestion, she supplemented the translation with extensive notes of her own, which were substantially longer than the original article. The notes included a step-by-step procedure for calculating Bernoulli numbers using the Analytical Engine, which has been described by later scholars as the first algorithm specifically intended for implementation on a machine.

In the notes, Lovelace also reflected on the broader potential of the Analytical Engine beyond numerical calculation and discussed the limitations of what such a machine could be expected to do independently.

Lovelace maintained a correspondence and working relationship with Babbage throughout this period. In later years, her health deteriorated significantly. She died on 27 November 1852 in London, at the age of 36. Interest in her work was revived substantially in the second half of the twentieth century, and the programming language Ada, developed for the United States Department of Defense in the 1980s, was named in her honour.