Hooray for the Lady who might have written the first algorithm! She needs more attention.

Other: Charles Babbage (sp?) and the Analytic Engine: perhaps our first real computer. Imagine a steampunk world where all our devices were powered by huge mechanical chunks and chonks.

I saw a video of a constructed Analytical Engine (they couldn’t manufacture the parts to the specs required in Babbage’s time) donated to a Computer History museum by an early Microsoft exec. Didn’t find it on a quick search, but it’s a huge thing driven by a physical crank.