Encyclopaedia Britannica identifies Ada Lovelace (1815–1852) as an English mathematician who collaborated with Charles Babbage and published a program for his Analytical Engine in 1843; it also records that she died of uterine cancer at thirty-six. The Computer History Museum explains that her annotated translation of Luigi Menabrea’s paper included the first published stepwise sequence of operations for solving mathematical problems, while noting scholarly debate about the extent and originality of her contribution. More consequentially, Lovelace wrote that the Engine could operate on things besides numbers, including music, anticipating rule-based symbolic computation. The Science Museum Group likewise describes her vision of a general-purpose programmable machine able to manipulate symbols, letters, and musical notes, and records her death from cancer at age thirty-six. Her lasting importance lies in articulating the conceptual shift from a calculating engine to a machine that could process symbols, decades before an electronic computer existed.