Happy 200th Birthday Ada Lovelace – Ada’s bicentenary – Ada Lovelace – Wikipedia, the free encyclopedia. Pictured above, celebrating Ada Lovelace day 2015 at Adafruit. Who is Ada? Augusta Ada King, Countess of Lovelace (née Byron; 10 December 1815 – 27 November 1852) was a British mathematician and writer, chiefly known...