Charles Babbage started the design of the first automatic mechanical calculator, his Difference Engine, in 1822, which eventually gave him the idea of the first programmable mechanical calculator, his Analytical Engine.
Charles Babbage iniciou o deseño da primeira calculadora automática mecánica, a súa máquina diferencial, en 1822, que finalmente deulle a idea da primeira calculadora mecánica programable, a súa máquina analítica.