Commemorating the 197th birth anniversary of world's first computer programmer Ada Lovelace, the Google doodle marking the occasion shows Ada holding a quill pen and writing the pioneering computer program.

The doodle has Ada - a well-known mathematician of the 19th century, and the daughter of romantic poet Lord Byron - seated on a desk and writing the program. The paper scroll, on which she is shown to be writing her algorithm, later coils in such a way that it forms the letters of the Google logo.

When the users move the pointer or the mouse over the logo, a bubble comes up to indicate that December 10 would have been the 197th birth anniversary of Ada Lovelace.

Ada Lovelace was born as Augusta Ada Byron, on December 10, 1815 in Piccadilly Terrace, Middlesex, England. Her father - from whom her mother had separated - died when she was only eight years old. She married William King, who later became an earl, and she became the countess of Lovelace.

Ada - who was only 36 years old when she died of uterine cancer in 1852 - was keenly interested in mathematical studies from an early age; and she received her early education in the subject from her mother, Annabella, who was a gifted mathematician herself.

Ada was described as 'the enchantress of numbers' by Charles Babbage because she showed her gift for mathematics while corresponding with Babbage when he was working on what is now considered a forerunner of the present-day computer.