› Foundations of Computing · 1 of 14

Ada Lovelace

1815–1852 · British

Realized Babbage's Analytical Engine could manipulate symbols, not only numbers.

Contribution: Wrote what is often called the first computer program — notes for how Babbage's Analytical Engine could compute Bernoulli numbers.
Saw that a calculating machine could also follow rules about symbols, music, and other non-numeric patterns.
Published her analysis as notes on Menabrea's account of the Engine, expanding it into a vision of general-purpose computing.
Key observations: A machine that only adds numbers is useful; a machine that manipulates symbols by rule can represent many kinds of work.
Imagination about what a machine might do can outrun the hardware that exists in your lifetime.
Careful notes — steps, conditions, expected results — are how you hand a plan to a future machine.
Conclusions: Programming is older than electronic computers; it begins as precise instructions for a general engine.
When someone says AI "understands," ask what symbols and rules (or examples) it was given.
General-purpose machines matter because the same substrate can serve many jobs.

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