In collaboration with Charles Babbage, Ada Lovelace (his “magical math fairy”) invented an Analytical Engine that in her words “might act upon other things besides number... the Engine might compose elaborate and scientific pieces of music of any degree of complexity or extent”. Our computers today share the same structure, with memory, programs, and a central processing unit.
The Analytical Engine was never built in its day, but was intricately designed and annotated with a coding system. More than 135 years later, a set of plans for Difference Engine #2 model was produced by the @ScienceMuseum in London and was later cloned for @ComputerHistory museum in California.
Credit: Science Museum