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On December 10, 1815, a daughter—Augusta Ada Byron—w ll born to Anna Isabella (Annabella) Byron, and George Gordon, Lord Byron. In England at that time Byron's fame derived not only from his poetry but also from his wild and scandalous behavi HI The marriage was strained from the beginning, and Annabella left Byron shortly after Ada's birth. By April of 1816, the two had signed separation papers. Byron left England, never to retun Throughout the rest of his life, he regretted that he was unable to see his daugnter. At one point he wrote to her:

Meanwhile, Annabella, who eventually was to become a baroness in her own right, and who was educated as both a mathematician and poet carried on with Ada's upbringing and education. Annabella gave Ada her first instruc tion in mathematics, but it soon became clear that Ada was gifted in the subject an( should receive more extensive tutoring. Ada received further training from Augustui DeMorgan, today famous for one of the basic theorems of Boolean algebra, the logica foundation for modern computers. By age eight Ada also had demonstrated an interes in mechanical devices and was building detailed model boats.
When she was 18, Ada visited the Mechanics Institute to hear Dr. Dionysius Lard ner's lectures on the "Difference Engine," a mechanical calculating machine built by Charles Babbage. She became so interested in the device that she arrange( to be introduced to Babbage. It was said that, upon seeing Babbage's machine, Ada was the only person in the room to understand immediately how it worked and to recognize its significance. Ada and Charles Babbage became lifelong friends; she worked with him helping to document his designs, translating writings about his work, and developing programs for his machines. In fact, Ada today is recognized as the first computer programmer in history.
When Babbage designed his Analytical Engine, Ada foresaw that it could go beyond arithmetic computations and become a general manipulator of symbols, and thus would have far-reaching capabilities. She even suggested that such a device eventually could be programmed with rules of harmony and composition so that it could produce "scientific" music. In effect, Ada foresaw the field of artificial intelligence more than 150 years ago.
In 1842 Babbage gave a series of lectures in Turin, Italy, on his Analytical Engine. One of  the attendees was Luigi Menabrea, who was so impressed that he wrote an account of Babbage's lectures. At age 27, Ada decided to translate the account into English, with the intent to add a few of her own notes about the machine. In the end, her notes were twice as long as the original material, and the document, "The Sketch of the Analytical Engine," became the definitive work on the subject.
It is obvious from Ada's letters that her "notes" were entirely her own and that Babbage was acting as a sometimes unappreciated editor. At one point, Ada wrote to him:

Ada gained the title Countess of Lovelace when she married Lord William Lovelace. The couple had three children, whose upbringing was left to Ada's mother, while Ada pursued her work in mathematics. Her husband was supportive of her work, but for a woman of that day, such behavior was considered almost as scandalous as some of her father's exploits.
Ada Lovelace died of cancer in 1852, just one year before a working Difference Engine was built in Sweden from one of Babbage's designs. Like her father, Ada lived only to age 36, and even though they led very different lives, she undoubtedly had admired him and took inspiration from his unconventional and rebellious nature. In the end, Ada asked to be buried beside him at the family's estate.